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Merge pull request #4 from kholia/PCF8574-I2C-LED

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feat: hal i2c pcf8574 lcd demos
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149
Examples/HAL/I2C/PCF8574_I2C_LCD/main.c Normal file
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// This example was tested with 'PY32F030F28P6TU TSSOP20' chip
#include "py32f0xx_hal_dma.h"
#include "py32f0xx_hal_i2c.h"
#include "py32f0xx_bsp_printf.h"
#define I2C_ADDRESS 0xA0 /* host address */
I2C_HandleTypeDef I2cHandle;
void APP_ErrorHandler(void);
static void APP_I2C_Config(void);
#define SLAVE_ADDRESS_LCD 0x4E // PCF8574
// LCD handling functions are borrowed from https://controllerstech.com/i2c-lcd-in-stm32/
void lcd_send_cmd (char cmd)
{
char data_u, data_l;
uint8_t data_t[4];
data_u = (cmd&0xf0);
data_l = ((cmd<<4)&0xf0);
data_t[0] = data_u|0x0C; // en=1, rs=0
data_t[1] = data_u|0x08; // en=0, rs=0
data_t[2] = data_l|0x0C; // en=1, rs=0
data_t[3] = data_l|0x08; // en=0, rs=0
HAL_I2C_Master_Transmit (&I2cHandle, SLAVE_ADDRESS_LCD,(uint8_t *) data_t, 4, 100);
}
void lcd_send_data (char data)
{
char data_u, data_l;
uint8_t data_t[4];
data_u = (data&0xf0);
data_l = ((data<<4)&0xf0);
data_t[0] = data_u|0x0D; // en=1, rs=0
data_t[1] = data_u|0x09; // en=0, rs=0
data_t[2] = data_l|0x0D; // en=1, rs=0
data_t[3] = data_l|0x09; // en=0, rs=0
HAL_I2C_Master_Transmit (&I2cHandle, SLAVE_ADDRESS_LCD,(uint8_t *) data_t, 4, 100);
}
void lcd_clear (void)
{
lcd_send_cmd (0x80);
for (int i=0; i<70; i++) {
lcd_send_data (' ');
}
}
void lcd_put_cur(int row, int col)
{
switch (row) {
case 0:
col |= 0x80;
break;
case 1:
col |= 0xC0;
break;
}
lcd_send_cmd (col);
}
void lcd_init (void)
{
// 4 bit initialisation
HAL_Delay(50); // wait for > 40ms
lcd_send_cmd (0x30);
HAL_Delay(5); // wait for > 4.1ms
lcd_send_cmd (0x30);
HAL_Delay(1); // wait for > 100us
lcd_send_cmd (0x30);
HAL_Delay(10);
lcd_send_cmd (0x20); // 4bit mode
HAL_Delay(10);
// display initialisation
lcd_send_cmd (0x28); // Function set --> DL=0 (4 bit mode), N = 1 (2 line display) F = 0 (5x8 characters)
HAL_Delay(1);
lcd_send_cmd (0x08); // Display on/off control --> D=0, C=0, B=0 ---> display off
HAL_Delay(1);
lcd_send_cmd (0x01); // clear display
HAL_Delay(1);
HAL_Delay(1);
lcd_send_cmd (0x06); // Entry mode set --> I/D = 1 (increment cursor) & S = 0 (no shift)
HAL_Delay(1);
lcd_send_cmd (0x0C); // Display on/off control --> D = 1, C and B = 0. (Cursor and blink, last two bits)
}
void lcd_send_string (char *str)
{
while (*str) lcd_send_data (*str++);
}
int main(void)
{
HAL_Init();
BSP_USART_Config();
printf("SystemClk:%ld\r\n", SystemCoreClock);
APP_I2C_Config();
lcd_init ();
lcd_send_string ("HELLO WORLD!");
HAL_Delay(1000);
lcd_put_cur(1, 0);
lcd_send_string("HOWDY!");
HAL_Delay(2000);
while(1);
}
static void APP_I2C_Config(void)
{
I2cHandle.Instance = I2C;
I2cHandle.Init.ClockSpeed = 100000; // 100KHz ~ 400KHz
I2cHandle.Init.DutyCycle = I2C_DUTYCYCLE_16_9;
I2cHandle.Init.OwnAddress1 = I2C_ADDRESS;
I2cHandle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
I2cHandle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&I2cHandle) != HAL_OK)
{
APP_ErrorHandler();
}
}
void APP_I2C_Transmit(uint8_t devAddress, uint8_t memAddress, uint8_t *pData, uint16_t len)
{
HAL_I2C_Mem_Write(&I2cHandle, devAddress, memAddress, I2C_MEMADD_SIZE_8BIT, pData, len, 5000);
}
void APP_ErrorHandler(void)
{
while (1);
}
#ifdef USE_FULL_ASSERT
/**
* @brief Export assert error source and line number
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
while (1);
}
#endif /* USE_FULL_ASSERT */

229
Examples/HAL/I2C/PCF8574_I2C_LCD/py32f0xx_hal_conf.h Normal file
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/**
******************************************************************************
* @file py32f0xx_hal_conf.h
* @author MCU Application Team
* @brief HAL configuration file.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) Puya Semiconductor Co.
* All rights reserved.</center></h2>
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __PY32F0xx_HAL_CONF_H
#define __PY32F0xx_HAL_CONF_H
#ifdef __cplusplus
extern "C" {
#endif
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* ########################## Module Selection ############################## */
/**
* @brief This is the list of modules to be used in the HAL driver
*/
#define HAL_MODULE_ENABLED
#define HAL_RCC_MODULE_ENABLED
/* #define HAL_ADC_MODULE_ENABLED */
/* #define HAL_CRC_MODULE_ENABLED */
/* #define HAL_COMP_MODULE_ENABLED */
#define HAL_FLASH_MODULE_ENABLED
#define HAL_GPIO_MODULE_ENABLED
/* #define HAL_IWDG_MODULE_ENABLED */
/* #define HAL_WWDG_MODULE_ENABLED */
#define HAL_TIM_MODULE_ENABLED
#define HAL_DMA_MODULE_ENABLED
/* #define HAL_LPTIM_MODULE_ENABLED */
#define HAL_PWR_MODULE_ENABLED
#define HAL_I2C_MODULE_ENABLED
#define HAL_UART_MODULE_ENABLED
/* #define HAL_SPI_MODULE_ENABLED */
/* #define HAL_RTC_MODULE_ENABLED */
/* #define HAL_LED_MODULE_ENABLED */
/* #define HAL_EXTI_MODULE_ENABLED */
#define HAL_CORTEX_MODULE_ENABLED
/* ########################## Oscillator Values adaptation ####################*/
#if !defined (HSI_VALUE)
#define HSI_VALUE ((uint32_t)8000000) /*!< Value of the Internal oscillator in Hz */
#endif /* HSI_VALUE */
/**
* @brief Adjust the value of External High Speed oscillator (HSE) used in your application.
* This value is used by the RCC HAL module to compute the system frequency
*/
#if !defined (HSE_VALUE)
#define HSE_VALUE ((uint32_t)24000000) /*!< Value of the External oscillator in Hz */
#endif /* HSE_VALUE */
#if !defined (HSE_STARTUP_TIMEOUT)
#define HSE_STARTUP_TIMEOUT ((uint32_t)200) /*!< Time out for HSE start up, in ms */
#endif /* HSE_STARTUP_TIMEOUT */
/**
* @brief Internal Low Speed Internal oscillator (LSI) value.
*/
#if !defined (LSI_VALUE)
#define LSI_VALUE ((uint32_t)32768) /*!< LSI Typical Value in Hz */
#endif /* LSI_VALUE */ /*!< Value of the Internal Low Speed oscillator in Hz
The real value may vary depending on the variations
in voltage and temperature. */
/**
* @brief Adjust the value of External Low Speed oscillator (LSE) used in your application.
* This value is used by the RCC HAL module to compute the system frequency
*/
#if !defined (LSE_VALUE)
#define LSE_VALUE ((uint32_t)32768) /*!< Value of the External oscillator in Hz*/
#endif /* LSE_VALUE */
#if !defined (LSE_STARTUP_TIMEOUT)
#define LSE_STARTUP_TIMEOUT ((uint32_t)5000) /*!< Time out for LSE start up, in ms */
#endif /* LSE_STARTUP_TIMEOUT */
/* Tip: To avoid modifying this file each time you need to use different HSE,
=== you can define the HSE value in your toolchain compiler preprocessor. */
/* ########################### System Configuration ######################### */
/**
* @brief This is the HAL system configuration section
*/
#define VDD_VALUE ((uint32_t)3300) /*!< Value of VDD in mv */
#define PRIORITY_HIGHEST 0
#define PRIORITY_HIGH 1
#define PRIORITY_LOW 2
#define PRIORITY_LOWEST 3
#define TICK_INT_PRIORITY ((uint32_t)PRIORITY_LOWEST) /*!< tick interrupt priority (lowest by default) */
#define USE_RTOS 0
#define PREFETCH_ENABLE 0
/* ########################## Assert Selection ############################## */
/**
* @brief Uncomment the line below to expanse the "assert_param" macro in the
* HAL drivers code
*/
/* #define USE_FULL_ASSERT 1U */
/* Includes ------------------------------------------------------------------*/
/**
* @brief Include module's header file
*/
#ifdef HAL_MODULE_ENABLED
#include "py32f0xx_hal.h"
#endif /* HAL_MODULE_ENABLED */
#ifdef HAL_RCC_MODULE_ENABLED
#include "py32f0xx_hal_rcc.h"
#endif /* HAL_RCC_MODULE_ENABLED */
#ifdef HAL_EXTI_MODULE_ENABLED
#include "py32f0xx_hal_exti.h"
#endif /* HAL_EXTI_MODULE_ENABLED */
#ifdef HAL_GPIO_MODULE_ENABLED
#include "py32f0xx_hal_gpio.h"
#endif /* HAL_GPIO_MODULE_ENABLED */
#ifdef HAL_CORTEX_MODULE_ENABLED
#include "py32f0xx_hal_cortex.h"
#endif /* HAL_CORTEX_MODULE_ENABLED */
#ifdef HAL_DMA_MODULE_ENABLED
#include "py32f0xx_hal_dma.h"
#endif /* HAL_DMA_MODULE_ENABLED */
#ifdef HAL_ADC_MODULE_ENABLED
#include "py32f0xx_hal_adc.h"
#endif /* HAL_ADC_MODULE_ENABLED */
#ifdef HAL_CRC_MODULE_ENABLED
#include "py32f0xx_hal_crc.h"
#endif /* HAL_CRC_MODULE_ENABLED */
#ifdef HAL_COMP_MODULE_ENABLED
#include "py32f0xx_hal_comp.h"
#endif /* HAL_COMP_MODULE_ENABLED */
#ifdef HAL_FLASH_MODULE_ENABLED
#include "py32f0xx_hal_flash.h"
#endif /* HAL_FLASH_MODULE_ENABLED */
#ifdef HAL_I2C_MODULE_ENABLED
#include "py32f0xx_hal_i2c.h"
#endif /* HAL_I2C_MODULE_ENABLED */
#ifdef HAL_IWDG_MODULE_ENABLED
#include "py32f0xx_hal_iwdg.h"
#endif /* HAL_IWDG_MODULE_ENABLED */
#ifdef HAL_PWR_MODULE_ENABLED
#include "py32f0xx_hal_pwr.h"
#endif /* HAL_PWR_MODULE_ENABLED */
#ifdef HAL_RTC_MODULE_ENABLED
#include "py32f0xx_hal_rtc.h"
#endif /* HAL_RTC_MODULE_ENABLED */
#ifdef HAL_SPI_MODULE_ENABLED
#include "py32f0xx_hal_spi.h"
#endif /* HAL_SPI_MODULE_ENABLED */
#ifdef HAL_TIM_MODULE_ENABLED
#include "py32f0xx_hal_tim.h"
#endif /* HAL_TIM_MODULE_ENABLED */
#ifdef HAL_LPTIM_MODULE_ENABLED
#include "py32f0xx_hal_lptim.h"
#endif /* HAL_LPTIM_MODULE_ENABLED */
#ifdef HAL_UART_MODULE_ENABLED
#include "py32f0xx_hal_uart.h"
#endif /* HAL_UART_MODULE_ENABLED */
#ifdef HAL_WWDG_MODULE_ENABLED
#include "py32f0xx_hal_wwdg.h"
#endif /* HAL_WWDG_MODULE_ENABLED */
#ifdef HAL_USART_MODULE_ENABLED
#include "py32f0xx_hal_usart.h"
#endif /* HAL_USART_MODULE_ENABLED */
/* Exported macro ------------------------------------------------------------*/
#ifdef USE_FULL_ASSERT
/**
* @brief The assert_param macro is used for function's parameters check.
* @param expr: If expr is false, it calls assert_failed function
* which reports the name of the source file and the source
* line number of the call that failed.
* If expr is true, it returns no value.
* @retval None
*/
#define assert_param(expr) ((expr) ? (void)0U : assert_failed((uint8_t *)__FILE__, __LINE__))
/* Exported functions ------------------------------------------------------- */
void assert_failed(uint8_t* file, uint32_t line);
#else
#define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */
#ifdef __cplusplus
}
#endif
#endif /* __PY32F0xx_HAL_CONF_H */
/************************ (C) COPYRIGHT Puya *****END OF FILE******************/

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Examples/HAL/I2C/PCF8574_I2C_LCD/py32f0xx_hal_msp.c Normal file
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/**
******************************************************************************
* @file py32f0xx_hal_msp.c
* @author MCU Application Team
* @brief This file provides code for the MSP Initialization
* and de-Initialization codes.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) Puya Semiconductor Co.
* All rights reserved.</center></h2>
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "py32f0xx_hal.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* External functions --------------------------------------------------------*/
/**
* @brief Configure the Flash prefetch and the Instruction cache,
* the time base source, NVIC and any required global low level hardware
* by calling the HAL_MspInit() callback function from HAL_Init()
*
*/
void HAL_MspInit(void)
{
}
void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
{
GPIO_InitTypeDef GPIO_InitStruct;
__HAL_RCC_I2C_CLK_ENABLE();
__HAL_RCC_GPIOF_CLK_ENABLE();
/**
PF1 ------> I2C1_SCL
PF0 ------> I2C1_SDA
*/
GPIO_InitStruct.Pin = GPIO_PIN_1 | GPIO_PIN_0;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_I2C;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
__HAL_RCC_I2C_FORCE_RESET();
__HAL_RCC_I2C_RELEASE_RESET();
}
/************************ (C) COPYRIGHT Puya *****END OF FILE******************/

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Examples/HAL/I2C/PCF8574_I2C_LCD/py32f0xx_it.c Normal file
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/**
******************************************************************************
* @file py32f0xx_it.c
* @author MCU Application Team
* @brief Interrupt Service Routines.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) Puya Semiconductor Co.
* All rights reserved.</center></h2>
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "py32f0xx_hal.h"
#include "py32f0xx_it.h"
/* Private includes ----------------------------------------------------------*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private user code ---------------------------------------------------------*/
/* External variables --------------------------------------------------------*/
/******************************************************************************/
/* Cortex-M0+ Processor Interruption and Exception Handlers */
/******************************************************************************/
/**
* @brief This function handles Non maskable interrupt.
*/
void NMI_Handler(void)
{
}
/**
* @brief This function handles Hard fault interrupt.
*/
void HardFault_Handler(void)
{
while (1)
{
}
}
/**
* @brief This function handles System service call via SWI instruction.
*/
void SVC_Handler(void)
{
}
/**
* @brief This function handles Pendable request for system service.
*/
void PendSV_Handler(void)
{
}
/**
* @brief This function handles System tick timer.
*/
void SysTick_Handler(void)
{
HAL_IncTick();
}
/******************************************************************************/
/* PY32F0xx Peripheral Interrupt Handlers */
/* Add here the Interrupt Handlers for the used peripherals. */
/* For the available peripheral interrupt handler names, */
/* please refer to the startup file. */
/******************************************************************************/
/************************ (C) COPYRIGHT Puya *****END OF FILE******************/

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Examples/HAL/I2C/PCF8574_I2C_LCD/py32f0xx_it.h Normal file
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/**
******************************************************************************
* @file py32f0xx_it.h
* @author MCU Application Team
* @brief This file contains the headers of the interrupt handlers.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) Puya Semiconductor Co.
* All rights reserved.</center></h2>
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __PY32F0XX_IT_H
#define __PY32F0XX_IT_H
#ifdef __cplusplus
extern "C" {
#endif
/* Private includes ----------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
/* Exported functions prototypes ---------------------------------------------*/
void NMI_Handler(void);
void HardFault_Handler(void);
void SVC_Handler(void);
void PendSV_Handler(void);
void SysTick_Handler(void);
#ifdef __cplusplus
}
#endif
#endif /* __PY32F0XX_IT_H */
/************************ (C) COPYRIGHT Puya *****END OF FILE******************/

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Examples/HAL/I2C/PCF8574_I2C_LCD_F003_SOP16/README.md Normal file
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Following `Makefile` changes are needed to run this example:
```diff
diff --git a/Makefile b/Makefile
index 5c24b12..cca49c1 100644
--- a/Makefile
+++ b/Makefile
@@ -38,13 +38,13 @@ PYOCD_EXE ?= pyocd
# py32f003x4, py32f003x6, py32f003x8,
# py32f030x3, py32f030x4, py32f030x6, py32f030x7, py32f030x8
# py32f072xb
-PYOCD_DEVICE ?= py32f030x8
+PYOCD_DEVICE ?= py32f003x6
##### Paths ############
# Link descript file: py32f002x5.ld, py32f003x6.ld, py32f003x8.ld, py32f030x6.ld, py32f030x8.ld
-LDSCRIPT = Libraries/LDScripts/py32f030x8.ld
+LDSCRIPT = Libraries/LDScripts/py32f003x6.ld
# Library build flags:
# PY32F002x5, PY32F002Ax5,
# PY32F003x4, PY32F003x6, PY32F003x8,
@@ -61,7 +61,7 @@ CFILES :=
# ASM source folders
ADIRS := User
# ASM single files
-AFILES := Libraries/CMSIS/Device/PY32F0xx/Source/gcc/startup_py32f030.s
+AFILES := Libraries/CMSIS/Device/PY32F0xx/Source/gcc/startup_py32f003.s
# Include paths
INCLUDES := Libraries/CMSIS/Core/Include \
```

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Examples/HAL/I2C/PCF8574_I2C_LCD_F003_SOP16/main.c Normal file
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// This example was tested with 'PY32F003W16S6TU SOP16' chip
#include "py32f0xx_hal_dma.h"
#include "py32f0xx_hal_i2c.h"
#include "py32f0xx_bsp_printf.h"
#define I2C_ADDRESS 0xA0 /* host address */
I2C_HandleTypeDef I2cHandle;
void APP_ErrorHandler(void);
static void APP_I2C_Config(void);
#define SLAVE_ADDRESS_LCD 0x4E // PCF8574
// LCD handling functions are borrowed from https://controllerstech.com/i2c-lcd-in-stm32/
void lcd_send_cmd (char cmd)
{
char data_u, data_l;
uint8_t data_t[4];
data_u = (cmd&0xf0);
data_l = ((cmd<<4)&0xf0);
data_t[0] = data_u|0x0C; // en=1, rs=0
data_t[1] = data_u|0x08; // en=0, rs=0
data_t[2] = data_l|0x0C; // en=1, rs=0
data_t[3] = data_l|0x08; // en=0, rs=0
HAL_I2C_Master_Transmit (&I2cHandle, SLAVE_ADDRESS_LCD,(uint8_t *) data_t, 4, 100);
}
void lcd_send_data (char data)
{
char data_u, data_l;
uint8_t data_t[4];
data_u = (data&0xf0);
data_l = ((data<<4)&0xf0);
data_t[0] = data_u|0x0D; // en=1, rs=0
data_t[1] = data_u|0x09; // en=0, rs=0
data_t[2] = data_l|0x0D; // en=1, rs=0
data_t[3] = data_l|0x09; // en=0, rs=0
HAL_I2C_Master_Transmit (&I2cHandle, SLAVE_ADDRESS_LCD,(uint8_t *) data_t, 4, 100);
}
void lcd_clear (void)
{
lcd_send_cmd (0x80);
for (int i=0; i<70; i++) {
lcd_send_data (' ');
}
}
void lcd_put_cur(int row, int col)
{
switch (row) {
case 0:
col |= 0x80;
break;
case 1:
col |= 0xC0;
break;
}
lcd_send_cmd (col);
}
void lcd_init (void)
{
// 4 bit initialisation
HAL_Delay(50); // wait for > 40ms
lcd_send_cmd (0x30);
HAL_Delay(5); // wait for > 4.1ms
lcd_send_cmd (0x30);
HAL_Delay(1); // wait for > 100us
lcd_send_cmd (0x30);
HAL_Delay(10);
lcd_send_cmd (0x20); // 4bit mode
HAL_Delay(10);
// display initialisation
lcd_send_cmd (0x28); // Function set --> DL=0 (4 bit mode), N = 1 (2 line display) F = 0 (5x8 characters)
HAL_Delay(1);
lcd_send_cmd (0x08); // Display on/off control --> D=0, C=0, B=0 ---> display off
HAL_Delay(1);
lcd_send_cmd (0x01); // clear display
HAL_Delay(1);
HAL_Delay(1);
lcd_send_cmd (0x06); // Entry mode set --> I/D = 1 (increment cursor) & S = 0 (no shift)
HAL_Delay(1);
lcd_send_cmd (0x0C); // Display on/off control --> D = 1, C and B = 0. (Cursor and blink, last two bits)
}
void lcd_send_string (char *str)
{
while (*str) lcd_send_data (*str++);
}
int main(void)
{
HAL_Init();
// BSP_USART_Config();
// printf("SystemClk:%ld\r\n", SystemCoreClock);
APP_I2C_Config();
lcd_init ();
lcd_send_string ("HELLO WORLD!");
HAL_Delay(1000);
lcd_put_cur(1, 0);
lcd_send_string("HOWDY!");
HAL_Delay(2000);
while(1);
}
static void APP_I2C_Config(void)
{
I2cHandle.Instance = I2C;
I2cHandle.Init.ClockSpeed = 100000; // 100KHz ~ 400KHz
I2cHandle.Init.DutyCycle = I2C_DUTYCYCLE_16_9;
I2cHandle.Init.OwnAddress1 = I2C_ADDRESS;
I2cHandle.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
I2cHandle.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&I2cHandle) != HAL_OK)
{
APP_ErrorHandler();
}
}
void APP_I2C_Transmit(uint8_t devAddress, uint8_t memAddress, uint8_t *pData, uint16_t len)
{
HAL_I2C_Mem_Write(&I2cHandle, devAddress, memAddress, I2C_MEMADD_SIZE_8BIT, pData, len, 5000);
}
void APP_ErrorHandler(void)
{
while (1);
}
#ifdef USE_FULL_ASSERT
/**
* @brief Export assert error source and line number
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
while (1);
}
#endif /* USE_FULL_ASSERT */

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/**
******************************************************************************
* @file py32f0xx_hal_conf.h
* @author MCU Application Team
* @brief HAL configuration file.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) Puya Semiconductor Co.
* All rights reserved.</center></h2>
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __PY32F0xx_HAL_CONF_H
#define __PY32F0xx_HAL_CONF_H
#ifdef __cplusplus
extern "C" {
#endif
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* ########################## Module Selection ############################## */
/**
* @brief This is the list of modules to be used in the HAL driver
*/
#define HAL_MODULE_ENABLED
#define HAL_RCC_MODULE_ENABLED
/* #define HAL_ADC_MODULE_ENABLED */
/* #define HAL_CRC_MODULE_ENABLED */
/* #define HAL_COMP_MODULE_ENABLED */
#define HAL_FLASH_MODULE_ENABLED
#define HAL_GPIO_MODULE_ENABLED
/* #define HAL_IWDG_MODULE_ENABLED */
/* #define HAL_WWDG_MODULE_ENABLED */
#define HAL_TIM_MODULE_ENABLED
#define HAL_DMA_MODULE_ENABLED
/* #define HAL_LPTIM_MODULE_ENABLED */
#define HAL_PWR_MODULE_ENABLED
#define HAL_I2C_MODULE_ENABLED
#define HAL_UART_MODULE_ENABLED
/* #define HAL_SPI_MODULE_ENABLED */
/* #define HAL_RTC_MODULE_ENABLED */
/* #define HAL_LED_MODULE_ENABLED */
/* #define HAL_EXTI_MODULE_ENABLED */
#define HAL_CORTEX_MODULE_ENABLED
/* ########################## Oscillator Values adaptation ####################*/
#if !defined (HSI_VALUE)
#define HSI_VALUE ((uint32_t)8000000) /*!< Value of the Internal oscillator in Hz */
#endif /* HSI_VALUE */
/**
* @brief Adjust the value of External High Speed oscillator (HSE) used in your application.
* This value is used by the RCC HAL module to compute the system frequency
*/
#if !defined (HSE_VALUE)
#define HSE_VALUE ((uint32_t)24000000) /*!< Value of the External oscillator in Hz */
#endif /* HSE_VALUE */
#if !defined (HSE_STARTUP_TIMEOUT)
#define HSE_STARTUP_TIMEOUT ((uint32_t)200) /*!< Time out for HSE start up, in ms */
#endif /* HSE_STARTUP_TIMEOUT */
/**
* @brief Internal Low Speed Internal oscillator (LSI) value.
*/
#if !defined (LSI_VALUE)
#define LSI_VALUE ((uint32_t)32768) /*!< LSI Typical Value in Hz */
#endif /* LSI_VALUE */ /*!< Value of the Internal Low Speed oscillator in Hz
The real value may vary depending on the variations
in voltage and temperature. */
/**
* @brief Adjust the value of External Low Speed oscillator (LSE) used in your application.
* This value is used by the RCC HAL module to compute the system frequency
*/
#if !defined (LSE_VALUE)
#define LSE_VALUE ((uint32_t)32768) /*!< Value of the External oscillator in Hz*/
#endif /* LSE_VALUE */
#if !defined (LSE_STARTUP_TIMEOUT)
#define LSE_STARTUP_TIMEOUT ((uint32_t)5000) /*!< Time out for LSE start up, in ms */
#endif /* LSE_STARTUP_TIMEOUT */
/* Tip: To avoid modifying this file each time you need to use different HSE,
=== you can define the HSE value in your toolchain compiler preprocessor. */
/* ########################### System Configuration ######################### */
/**
* @brief This is the HAL system configuration section
*/
#define VDD_VALUE ((uint32_t)3300) /*!< Value of VDD in mv */
#define PRIORITY_HIGHEST 0
#define PRIORITY_HIGH 1
#define PRIORITY_LOW 2
#define PRIORITY_LOWEST 3
#define TICK_INT_PRIORITY ((uint32_t)PRIORITY_LOWEST) /*!< tick interrupt priority (lowest by default) */
#define USE_RTOS 0
#define PREFETCH_ENABLE 0
/* ########################## Assert Selection ############################## */
/**
* @brief Uncomment the line below to expanse the "assert_param" macro in the
* HAL drivers code
*/
/* #define USE_FULL_ASSERT 1U */
/* Includes ------------------------------------------------------------------*/
/**
* @brief Include module's header file
*/
#ifdef HAL_MODULE_ENABLED
#include "py32f0xx_hal.h"
#endif /* HAL_MODULE_ENABLED */
#ifdef HAL_RCC_MODULE_ENABLED
#include "py32f0xx_hal_rcc.h"
#endif /* HAL_RCC_MODULE_ENABLED */
#ifdef HAL_EXTI_MODULE_ENABLED
#include "py32f0xx_hal_exti.h"
#endif /* HAL_EXTI_MODULE_ENABLED */
#ifdef HAL_GPIO_MODULE_ENABLED
#include "py32f0xx_hal_gpio.h"
#endif /* HAL_GPIO_MODULE_ENABLED */
#ifdef HAL_CORTEX_MODULE_ENABLED
#include "py32f0xx_hal_cortex.h"
#endif /* HAL_CORTEX_MODULE_ENABLED */
#ifdef HAL_DMA_MODULE_ENABLED
#include "py32f0xx_hal_dma.h"
#endif /* HAL_DMA_MODULE_ENABLED */
#ifdef HAL_ADC_MODULE_ENABLED
#include "py32f0xx_hal_adc.h"
#endif /* HAL_ADC_MODULE_ENABLED */
#ifdef HAL_CRC_MODULE_ENABLED
#include "py32f0xx_hal_crc.h"
#endif /* HAL_CRC_MODULE_ENABLED */
#ifdef HAL_COMP_MODULE_ENABLED
#include "py32f0xx_hal_comp.h"
#endif /* HAL_COMP_MODULE_ENABLED */
#ifdef HAL_FLASH_MODULE_ENABLED
#include "py32f0xx_hal_flash.h"
#endif /* HAL_FLASH_MODULE_ENABLED */
#ifdef HAL_I2C_MODULE_ENABLED
#include "py32f0xx_hal_i2c.h"
#endif /* HAL_I2C_MODULE_ENABLED */
#ifdef HAL_IWDG_MODULE_ENABLED
#include "py32f0xx_hal_iwdg.h"
#endif /* HAL_IWDG_MODULE_ENABLED */
#ifdef HAL_PWR_MODULE_ENABLED
#include "py32f0xx_hal_pwr.h"
#endif /* HAL_PWR_MODULE_ENABLED */
#ifdef HAL_RTC_MODULE_ENABLED
#include "py32f0xx_hal_rtc.h"
#endif /* HAL_RTC_MODULE_ENABLED */
#ifdef HAL_SPI_MODULE_ENABLED
#include "py32f0xx_hal_spi.h"
#endif /* HAL_SPI_MODULE_ENABLED */
#ifdef HAL_TIM_MODULE_ENABLED
#include "py32f0xx_hal_tim.h"
#endif /* HAL_TIM_MODULE_ENABLED */
#ifdef HAL_LPTIM_MODULE_ENABLED
#include "py32f0xx_hal_lptim.h"
#endif /* HAL_LPTIM_MODULE_ENABLED */
#ifdef HAL_UART_MODULE_ENABLED
#include "py32f0xx_hal_uart.h"
#endif /* HAL_UART_MODULE_ENABLED */
#ifdef HAL_WWDG_MODULE_ENABLED
#include "py32f0xx_hal_wwdg.h"
#endif /* HAL_WWDG_MODULE_ENABLED */
#ifdef HAL_USART_MODULE_ENABLED
#include "py32f0xx_hal_usart.h"
#endif /* HAL_USART_MODULE_ENABLED */
/* Exported macro ------------------------------------------------------------*/
#ifdef USE_FULL_ASSERT
/**
* @brief The assert_param macro is used for function's parameters check.
* @param expr: If expr is false, it calls assert_failed function
* which reports the name of the source file and the source
* line number of the call that failed.
* If expr is true, it returns no value.
* @retval None
*/
#define assert_param(expr) ((expr) ? (void)0U : assert_failed((uint8_t *)__FILE__, __LINE__))
/* Exported functions ------------------------------------------------------- */
void assert_failed(uint8_t* file, uint32_t line);
#else
#define assert_param(expr) ((void)0U)
#endif /* USE_FULL_ASSERT */
#ifdef __cplusplus
}
#endif
#endif /* __PY32F0xx_HAL_CONF_H */
/************************ (C) COPYRIGHT Puya *****END OF FILE******************/

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/**
******************************************************************************
* @file py32f0xx_hal_msp.c
* @author MCU Application Team
* @brief This file provides code for the MSP Initialization
* and de-Initialization codes.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) Puya Semiconductor Co.
* All rights reserved.</center></h2>
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "py32f0xx_hal.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* External functions --------------------------------------------------------*/
/**
* @brief Configure the Flash prefetch and the Instruction cache,
* the time base source, NVIC and any required global low level hardware
* by calling the HAL_MspInit() callback function from HAL_Init()
*
*/
void HAL_MspInit(void)
{
}
void HAL_I2C_MspInit(I2C_HandleTypeDef *hi2c)
{
GPIO_InitTypeDef GPIO_InitStruct;
__HAL_RCC_I2C_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
// PF1 ------> I2C1_SCL
// PF0 ------> I2C1_SDA
GPIO_InitStruct.Pin = GPIO_PIN_2 | GPIO_PIN_3;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF12_I2C;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
__HAL_RCC_I2C_FORCE_RESET();
__HAL_RCC_I2C_RELEASE_RESET();
}
/************************ (C) COPYRIGHT Puya *****END OF FILE******************/

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/**
******************************************************************************
* @file py32f0xx_it.c
* @author MCU Application Team
* @brief Interrupt Service Routines.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) Puya Semiconductor Co.
* All rights reserved.</center></h2>
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "py32f0xx_hal.h"
#include "py32f0xx_it.h"
/* Private includes ----------------------------------------------------------*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private user code ---------------------------------------------------------*/
/* External variables --------------------------------------------------------*/
/******************************************************************************/
/* Cortex-M0+ Processor Interruption and Exception Handlers */
/******************************************************************************/
/**
* @brief This function handles Non maskable interrupt.
*/
void NMI_Handler(void)
{
}
/**
* @brief This function handles Hard fault interrupt.
*/
void HardFault_Handler(void)
{
while (1)
{
}
}
/**
* @brief This function handles System service call via SWI instruction.
*/
void SVC_Handler(void)
{
}
/**
* @brief This function handles Pendable request for system service.
*/
void PendSV_Handler(void)
{
}
/**
* @brief This function handles System tick timer.
*/
void SysTick_Handler(void)
{
HAL_IncTick();
}
/******************************************************************************/
/* PY32F0xx Peripheral Interrupt Handlers */
/* Add here the Interrupt Handlers for the used peripherals. */
/* For the available peripheral interrupt handler names, */
/* please refer to the startup file. */
/******************************************************************************/
/************************ (C) COPYRIGHT Puya *****END OF FILE******************/

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/**
******************************************************************************
* @file py32f0xx_it.h
* @author MCU Application Team
* @brief This file contains the headers of the interrupt handlers.
******************************************************************************
* @attention
*
* <h2><center>&copy; Copyright (c) Puya Semiconductor Co.
* All rights reserved.</center></h2>
*
* <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __PY32F0XX_IT_H
#define __PY32F0XX_IT_H
#ifdef __cplusplus
extern "C" {
#endif
/* Private includes ----------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
/* Exported functions prototypes ---------------------------------------------*/
void NMI_Handler(void);
void HardFault_Handler(void);
void SVC_Handler(void);
void PendSV_Handler(void);
void SysTick_Handler(void);
#ifdef __cplusplus
}
#endif
#endif /* __PY32F0XX_IT_H */
/************************ (C) COPYRIGHT Puya *****END OF FILE******************/