feat: ll i2c at24c32 example

Examples/LL/I2C/AT24C32/main.c

@@ -0,0 +1,259 @@
+/***
+ * Demo: I2C - AT24C32 Read/Write
+ * 
+ * PY32          
+ *  PF1          SCL
+ *  PF0          SDA
+ */
+#include <string.h>
+#include "main.h"
+#include "py32f0xx_bsp_printf.h"
+
+
+#define MASTER_ADDRESS      0xA0
+#define AT24C_ADDRESS       0xAE
+#define AT24C_MEM_ADDRESS   0x80
+
+#define I2C_STATE_READY    0
+#define I2C_STATE_BUSY_TX  1
+#define I2C_STATE_BUSY_RX  2
+
+/*
+ * EERPOM data address length
+ * 
+ * 1-byte: AT24C01 - AT24C16
+ * 2-byte: AT24C32+
+ */
+#define AT24C_DATA_ADDR_8B    0
+#define AT24C_DATA_ADDR_16B   1
+#define AT24C_DATA_ADDR_LEN   AT24C_DATA_ADDR_16B
+
+#define SIZE sizeof(test_text)
+const uint8_t test_text[]={"I2C read/write test"};
+
+__IO uint32_t   i2cState  = I2C_STATE_READY;
+
+static void APP_SystemClockConfig(void);
+static void APP_I2CConfig(void);
+void APP_I2C_Transmit(uint8_t devAddress, uint16_t memAddress, uint8_t *pData, uint16_t len);
+uint8_t APP_I2C_ReceiveByte(uint16_t devAddress, uint16_t memAddress);
+
+void AT24CXX_Read(uint16_t dataAddr, uint8_t *pBuffer, uint16_t len)
+{
+  while (len--)
+  {
+    *pBuffer++ = APP_I2C_ReceiveByte(AT24C_ADDRESS, dataAddr++);
+    LL_mDelay(5);
+  }
+}
+
+void AT24CXX_Write(uint16_t dataAddr, uint8_t *pBuffer, uint16_t len)
+{
+  while (len--)
+  {
+    APP_I2C_Transmit(AT24C_ADDRESS, dataAddr++, pBuffer++, 1);
+    // Writing might halt if delay is too short
+    LL_mDelay(5);
+  }
+}
+
+int main(void)
+{
+  uint8_t buf[SIZE];
+
+  APP_SystemClockConfig();
+
+  BSP_USART_Config(115200);
+  printf("I2C Demo: AT24C32\r\nClock: %ld\r\n", SystemCoreClock);
+
+  APP_I2CConfig();
+
+  printf("Start writing...");
+  AT24CXX_Write(AT24C_MEM_ADDRESS, (uint8_t *)test_text, SIZE);
+  printf("succ\r\n");
+
+  printf("Start reading...");
+  AT24CXX_Read(AT24C_MEM_ADDRESS, buf, SIZE);
+  printf("read: %s\r\n", buf);
+
+  while(1);
+}
+
+static void APP_I2CConfig(void)
+{
+  LL_GPIO_InitTypeDef GPIO_InitStruct = {0};
+
+  LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOF);
+  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_I2C1);
+
+  // PF1 SCL
+  GPIO_InitStruct.Pin = LL_GPIO_PIN_1;
+  GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
+  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_HIGH;
+  GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_OPENDRAIN;
+  GPIO_InitStruct.Pull = LL_GPIO_PULL_UP;
+  GPIO_InitStruct.Alternate = LL_GPIO_AF_12;
+  LL_GPIO_Init(GPIOF, &GPIO_InitStruct);
+
+  // PF0 SDA
+  GPIO_InitStruct.Pin = LL_GPIO_PIN_0;
+  GPIO_InitStruct.Alternate = LL_GPIO_AF_12;
+  LL_GPIO_Init(GPIOF, &GPIO_InitStruct);
+
+  LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1);
+  LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1);
+
+  LL_I2C_InitTypeDef I2C_InitStruct;
+  /*
+   * Clock speed:
+   * - standard = 100khz
+   * - fast     = 400khz
+  */
+  I2C_InitStruct.ClockSpeed      = LL_I2C_MAX_SPEED_FAST;
+  I2C_InitStruct.DutyCycle       = LL_I2C_DUTYCYCLE_16_9;
+  I2C_InitStruct.OwnAddress1     = MASTER_ADDRESS;
+  I2C_InitStruct.TypeAcknowledge = LL_I2C_NACK;
+  LL_I2C_Init(I2C1, &I2C_InitStruct);
+}
+
+void APP_I2C_Transmit(uint8_t devAddress, uint16_t memAddress, uint8_t *pData, uint16_t len)
+{
+  while (i2cState == I2C_STATE_BUSY_TX);
+  LL_I2C_DisableBitPOS(I2C1);
+
+  i2cState = I2C_STATE_BUSY_TX;
+  /* Start */
+  LL_I2C_GenerateStartCondition(I2C1);
+  while (LL_I2C_IsActiveFlag_SB(I2C1) != 1);
+  /* Send slave address */
+  LL_I2C_TransmitData8(I2C1, (devAddress & (uint8_t)(~0x01)));
+  while(LL_I2C_IsActiveFlag_ADDR(I2C1) != 1);
+  LL_I2C_ClearFlag_ADDR(I2C1);
+
+  /* Send memory address */
+  while(LL_I2C_IsActiveFlag_TXE(I2C1) != 1);
+#if (AT24C_DATA_ADDR_LEN == AT24C_DATA_ADDR_8B)
+  LL_I2C_TransmitData8(I2C1, (uint8_t)(memAddress & 0x00FF));
+#elif (AT24C_DATA_ADDR_LEN == AT24C_DATA_ADDR_16B)
+  LL_I2C_TransmitData8(I2C1, (uint8_t)((memAddress & 0xFF00) >> 8));
+  while(LL_I2C_IsActiveFlag_TXE(I2C1) != 1);
+
+  LL_I2C_TransmitData8(I2C1, (uint8_t)(memAddress & 0x00FF));
+#endif
+  while(LL_I2C_IsActiveFlag_TXE(I2C1) != 1);
+
+  /* Transfer data */
+  while (len > 0)
+  {
+    while (LL_I2C_IsActiveFlag_TXE(I2C1) != 1);
+    LL_I2C_TransmitData8(I2C1, *pData++);
+    len--;
+
+    if ((LL_I2C_IsActiveFlag_BTF(I2C1) == 1) && (len != 0U))
+    {
+      LL_I2C_TransmitData8(I2C1, *pData++);
+      len--;
+    }
+
+    while (LL_I2C_IsActiveFlag_BTF(I2C1) != 1);
+  }
+
+  /* Stop */
+  LL_I2C_GenerateStopCondition(I2C1);
+  i2cState = I2C_STATE_READY;
+}
+
+uint8_t APP_I2C_ReceiveByte(uint16_t devAddress, uint16_t memAddress)
+{
+  uint8_t temp = 0;
+
+  LL_I2C_DisableBitPOS(I2C1);
+  i2cState    = I2C_STATE_BUSY_RX;
+
+  /* Start */
+  LL_I2C_GenerateStartCondition(I2C1);
+  while(LL_I2C_IsActiveFlag_SB(I2C1) != 1);
+  
+  /* Send slave address */
+  LL_I2C_TransmitData8(I2C1, (devAddress & (uint8_t)(~0x01)));
+  while(LL_I2C_IsActiveFlag_ADDR(I2C1) != 1);
+  LL_I2C_ClearFlag_ADDR(I2C1);
+
+  /* Send memory address */
+  while(LL_I2C_IsActiveFlag_TXE(I2C1) != 1);
+#if (AT24C_DATA_ADDR_LEN == AT24C_DATA_ADDR_8B)
+  LL_I2C_TransmitData8(I2C1, (uint8_t)(memAddress & 0x00FF));
+
+#elif (AT24C_DATA_ADDR_LEN == AT24C_DATA_ADDR_16B)
+  LL_I2C_TransmitData8(I2C1, (uint8_t)((memAddress & 0xFF00) >> 8));
+  while(LL_I2C_IsActiveFlag_TXE(I2C1) != 1);
+
+  LL_I2C_TransmitData8(I2C1, (uint8_t)(memAddress & 0x00FF));
+#endif
+  while(LL_I2C_IsActiveFlag_TXE(I2C1) != 1);
+
+  /* Start */
+  LL_I2C_GenerateStartCondition(I2C1);
+  while(LL_I2C_IsActiveFlag_SB(I2C1) != 1);
+
+  /* Send slave address(read) */
+  LL_I2C_TransmitData8(I2C1, (devAddress | 0x1));
+  while(LL_I2C_IsActiveFlag_ADDR(I2C1) != 1);
+  LL_I2C_ClearFlag_ADDR(I2C1);
+
+  while(LL_I2C_IsActiveFlag_RXNE(I2C1) != 1);
+  LL_I2C_AcknowledgeNextData(I2C1, LL_I2C_NACK);
+  temp = LL_I2C_ReceiveData8(I2C1);
+  LL_I2C_GenerateStopCondition(I2C1);
+
+  i2cState = I2C_STATE_READY;
+  return temp;
+}
+
+static void APP_SystemClockConfig(void)
+{
+  LL_UTILS_ClkInitTypeDef UTILS_ClkInitStruct;
+
+  LL_RCC_HSI_Enable();
+  /* Change this value to adjust frequency */
+  LL_RCC_HSI_SetCalibFreq(LL_RCC_HSICALIBRATION_24MHz + 15);
+  while (LL_RCC_HSI_IsReady() != 1);
+
+  UTILS_ClkInitStruct.AHBCLKDivider = LL_RCC_SYSCLK_DIV_1;
+  UTILS_ClkInitStruct.APB1CLKDivider = LL_RCC_APB1_DIV_1;
+  LL_PLL_ConfigSystemClock_HSI(&UTILS_ClkInitStruct);
+
+  /* Re-init frequency of SysTick source, reload = freq/ticks = 48000000/1000 = 48000 */
+  LL_InitTick(48000000, 1000U);
+}
+// static void APP_SystemClockConfig(void)
+// {
+//   LL_RCC_HSI_Enable();
+//   LL_RCC_HSI_SetCalibFreq(LL_RCC_HSICALIBRATION_8MHz);
+//   while(LL_RCC_HSI_IsReady() != 1);
+
+//   LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
+
+//   LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSISYS);
+//   while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSISYS);
+
+//   LL_FLASH_SetLatency(LL_FLASH_LATENCY_0);
+
+//   LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
+//   /* Update global SystemCoreClock(or through SystemCoreClockUpdate function) */
+//   LL_SetSystemCoreClock(8000000);
+//   /* Re-init frequency of SysTick source, reload = freq/ticks = 48000000/1000 = 48000 */
+//   LL_InitTick(8000000, 1000U);
+// }
+
+void APP_ErrorHandler(void)
+{
+  while (1);
+}
+
+#ifdef  USE_FULL_ASSERT
+void assert_failed(uint8_t *file, uint32_t line)
+{
+  while (1);
+}
+#endif /* USE_FULL_ASSERT */

Examples/LL/I2C/AT24C32/main.h

@@ -0,0 +1,27 @@
+#ifndef __MAIN_H
+#define __MAIN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "py32f0xx_ll_bus.h"
+#include "py32f0xx_ll_cortex.h"
+#include "py32f0xx_ll_dma.h"
+#include "py32f0xx_ll_exti.h"
+#include "py32f0xx_ll_gpio.h"
+#include "py32f0xx_ll_pwr.h"
+#include "py32f0xx_ll_rcc.h"
+#include "py32f0xx_ll_i2c.h"
+#include "py32f0xx_ll_system.h"
+#include "py32f0xx_ll_tim.h"
+#include "py32f0xx_ll_utils.h"
+
+
+void APP_ErrorHandler(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __MAIN_H */

Examples/LL/I2C/AT24C32/py32f0xx_it.c

@@ -0,0 +1,40 @@
+#include "main.h"
+#include "py32f0xx_it.h"
+
+/**
+  * @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)
+{
+}

Examples/LL/I2C/AT24C32/py32f0xx_it.h

@@ -0,0 +1,19 @@
+#ifndef __PY32F0XX_IT_H
+#define __PY32F0XX_IT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+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 */