Posted on September 01, 2015 at 12:16
Hello, i have following code generated from STM32CubeMx.
Transmit function returns HAL_OK status but under scope clock line stay always low.
I have tried several codes to run this bus but always nothing. What im doing wrong?
I guess something is missing.
#include ''stm32f4xx_hal.h''
#include ''stm32f4xx_hal_spi.h''
#include ''FreeRTOS.h''
#include ''task.h''
#include ''timers.h''
#include <stdio.h>
#include <string.h>
void
IO_Init(
void
);
void
vTimerCallback (TimerHandle_t pxTimer);
void
MX_SPI3_Init(
void
);
TimerHandle_t Timer;
SPI_HandleTypeDef hspi3;
int
a = 1000;
int
main (
void
) {
HAL_Init();
IO_Init();
MX_SPI3_Init();
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_14, GPIO_PIN_RESET);
// led low
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_SET);
// cs high
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_RESET);
// cs low
HAL_SPI_Transmit(&hspi3, (uint8_t*)64, 1, 0xFFFF);
// transmit device address
HAL_SPI_Transmit(&hspi3, (uint8_t*)0, 1, 0xFFFF);
// transmit register address
HAL_SPI_Transmit(&hspi3, (uint8_t*)0, 1, 0xFFFF);
// treanmit value
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_SET);
// cs high
Timer = xTimerCreate(
''Timer''
, a / portTICK_PERIOD_MS, pdTRUE, (
void
*) 12, vTimerCallback);
xTimerStart(Timer, 0);
vTaskStartScheduler();
return
0;
}
void
vTimerCallback( TimerHandle_t pxTimer )
{
HAL_GPIO_TogglePin(GPIOG, GPIO_PIN_14);
// toggle
// start
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_RESET);
//CS low
HAL_SPI_Transmit(&hspi3, (uint8_t*)0, 1, 0xFFFF);
// transmit device address
HAL_SPI_Transmit(&hspi3, (uint8_t*)0x12, 1, 0xFFFF);
// transmit register address
HAL_SPI_Transmit(&hspi3, (uint8_t*)1, 1, 0xFFFF);
// treanmit value
HAL_GPIO_WritePin(GPIOG, GPIO_PIN_13, GPIO_PIN_SET);
//CS high
}
void
MX_SPI3_Init(
void
)
{
__SPI3_CLK_ENABLE();
hspi3.Instance = SPI3;
hspi3.Init.Mode = SPI_MODE_MASTER;
hspi3.Init.Direction = SPI_DIRECTION_2LINES;
hspi3.Init.DataSize = SPI_DATASIZE_8BIT;
hspi3.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi3.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi3.Init.NSS = SPI_NSS_SOFT;
hspi3.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
hspi3.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi3.Init.TIMode = SPI_TIMODE_DISABLED;
hspi3.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
hspi3.Init.CRCPolynomial = 10;
HAL_SPI_Init(&hspi3);
}
void
IO_Init(
void
){
GPIO_InitTypeDef GPIO_InitStruct;
__GPIOG_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_14 | GPIO_PIN_13;
// led and cs
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
// push-pull output
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
// pull-down enabled
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
// analog pin bandwidth limited
HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
}
#discovery #spi #stm32f429
