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I2c scanning example

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This commit is contained in:
Thomas Klaehn
2021-07-05 15:09:52 +02:00
parent a22139568c
commit cffedfd6ba
8 changed files with 7987 additions and 48 deletions
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4
Core/Inc/stm32g0xx_hal_conf.h
View File

@@ -42,9 +42,9 @@ extern "C" {
/* #define HAL_EXTI_MODULE_ENABLED */
/* #define HAL_FDCAN_MODULE_ENABLED */
/* #define HAL_HCD_MODULE_ENABLED */
/* #define HAL_I2C_MODULE_ENABLED */
#define HAL_I2C_MODULE_ENABLED
/* #define HAL_I2S_MODULE_ENABLED */
#define HAL_IWDG_MODULE_ENABLED
/* #define HAL_IWDG_MODULE_ENABLED */
/* #define HAL_IRDA_MODULE_ENABLED */
/* #define HAL_LPTIM_MODULE_ENABLED */
/* #define HAL_PCD_MODULE_ENABLED */

103
Core/Src/main.c
View File

@@ -5,13 +5,14 @@
#include "main.h"
IWDG_HandleTypeDef hiwdg;
UART_HandleTypeDef huart2;
I2C_HandleTypeDef hi2c1;
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_USART2_UART_Init(void);
static void MX_IWDG_Init(void);
static void MX_I2C1_Init(void);
#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
@@ -28,33 +29,24 @@ PUTCHAR_PROTOTYPE
int main(void)
{
unsigned int i = 1, j = 40;
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_USART2_UART_Init();
MX_IWDG_Init();
MX_I2C1_Init();
while (1) {
if (j < 100) {
j += 10;
printf("\r\nStarting I2C Scanning:\r\n");
for(uint8_t i = 1; i < 128; i++) {
uint8_t ret = HAL_I2C_IsDeviceReady(&hi2c1, (uint16_t)(i<<1), 3, 5);
if (ret != HAL_OK) { /* No ACK Received At That Address */
printf(" - ");
} else if(ret == HAL_OK) {
printf("0x%X", i);
}
else if (j < 200) {
j += 20;
}
else if (j < 400) {
j += 40;
}
if (j > 800) {
j = 800;
}
printf("%u: Hello World\r\n", i++);
HAL_GPIO_TogglePin(LED_GREEN_GPIO_Port, LED_GREEN_Pin);
HAL_Delay(j);
HAL_IWDG_Refresh(&hiwdg);
}
printf("\r\nDone! \r\n\r\n");
while(1) {};
}
void SystemClock_Config(void)
@@ -89,24 +81,13 @@ void SystemClock_Config(void)
Error_Handler();
}
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2 | RCC_PERIPHCLK_I2C1;
PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
Error_Handler();
}
}
static void MX_IWDG_Init(void)
{
hiwdg.Instance = IWDG;
hiwdg.Init.Prescaler = IWDG_PRESCALER_4;
hiwdg.Init.Window = 4095;
hiwdg.Init.Reload = 4095;
if (HAL_IWDG_Init(&hiwdg) != HAL_OK) {
Error_Handler();
}
}
static void MX_USART2_UART_Init(void)
{
huart2.Instance = USART2;
@@ -125,6 +106,52 @@ static void MX_USART2_UART_Init(void)
}
}
/**
* @brief I2C1 Initialization Function
* @param None
* @retval None
*/
static void MX_I2C1_Init(void)
{
/* USER CODE BEGIN I2C1_Init 0 */
/* USER CODE END I2C1_Init 0 */
/* USER CODE BEGIN I2C1_Init 1 */
/* USER CODE END I2C1_Init 1 */
hi2c1.Instance = I2C1;
hi2c1.Init.Timing = 0x10707DBC;
hi2c1.Init.OwnAddress1 = 0;
hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
hi2c1.Init.OwnAddress2 = 0;
hi2c1.Init.OwnAddress2Masks = I2C_OA2_NOMASK;
hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
if (HAL_I2C_Init(&hi2c1) != HAL_OK)
{
Error_Handler();
}
/** Configure Analogue filter
*/
if (HAL_I2CEx_ConfigAnalogFilter(&hi2c1, I2C_ANALOGFILTER_ENABLE) != HAL_OK)
{
Error_Handler();
}
/** Configure Digital filter
*/
if (HAL_I2CEx_ConfigDigitalFilter(&hi2c1, 0) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN I2C1_Init 2 */
/* USER CODE END I2C1_Init 2 */
}
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
@@ -148,11 +175,3 @@ void Error_Handler(void)
while (1) {
}
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t *file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
}
#endif /* USE_FULL_ASSERT */

27
Core/Src/stm32g0xx_hal_msp.c
View File

@@ -32,3 +32,30 @@ void HAL_UART_MspDeInit(UART_HandleTypeDef* huart)
HAL_GPIO_DeInit(GPIOA, USART2_TX_Pin | USART2_RX_Pin);
}
}
void HAL_I2C_MspInit(I2C_HandleTypeDef* hi2c)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(hi2c->Instance == I2C1) {
__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_9|GPIO_PIN_10;
GPIO_InitStruct.Mode = GPIO_MODE_AF_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF6_I2C1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
__HAL_RCC_I2C1_CLK_ENABLE();
HAL_NVIC_SetPriority(I2C1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(I2C1_IRQn);
}
}
void HAL_I2C_MspDeInit(I2C_HandleTypeDef* hi2c)
{
if(hi2c->Instance == I2C1) {
__HAL_RCC_I2C1_CLK_DISABLE();
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9);
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_10);
HAL_NVIC_DisableIRQ(I2C1_IRQn);
}
}