是否有人拥有带有TLC59116 I2C示例代码的STM32L0xx？

Question

I am writing a basic LED program to light LEDs on a custom board using an STM32L0xx chip and the TI TLC59116F, and I'm having some trouble interpreting the data sheet.

I used STM32CubeMX to set up the initial pins and init I2C, and have come up with the following based on some examples I found.

/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "led.h"

/* Private variables ---------------------------------------------------------*/

void TLC59116_Init(void)
{
    // Set default register values
    TLC59116_WriteReg(TLC59116_MODE1, TLC59116_MODE1_DEFAULT);
    TLC59116_WriteReg(TLC59116_MODE2, TLC59116_MODE2_DEFAULT);

    // Set all PWM values to 0x00 (OFF)
    uint8_t aTXBuffer[] = { TLC59116_PWM0_AUTOINCR, TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF,
            TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF,
            TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF,
            TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF,
            TLC59116_LEDOUT_OFF, TLC59116_LEDOUT_OFF };

    TLC59116_WriteStream(sizeof(aTXBuffer), aTXBuffer);

    // Set all LEDs to PWM Control
    TLC59116_WriteReg(TLC59116_LEDOUT0, TLC59116_LEDOUT_ON);
    TLC59116_WriteReg(TLC59116_LEDOUT1, TLC59116_LEDOUT_ON);
    TLC59116_WriteReg(TLC59116_LEDOUT2, TLC59116_LEDOUT_ON);
    TLC59116_WriteReg(TLC59116_LEDOUT3, TLC59116_LEDOUT_ON);

}

static void TLC59116_WriteReg(uint8_t reg, uint8_t val)
{
    uint8_t aTXBuffer[] = { reg, val };
    while(HAL_I2C_Master_Transmit(&hi2c1, TLC59116_ADDR, aTXBuffer, sizeof(aTXBuffer), 100) != HAL_OK)
        {
            if (HAL_I2C_GetError(&hi2c1) != HAL_I2C_ERROR_AF)
            {
                Error_Handler();
            }
        }
}

static void TLC59116_WriteStream(uint8_t len, uint8_t *pData)
{
    if (len == 0)
    {
        Error_Handler();
    }
    while(HAL_I2C_Master_Transmit(&hi2c1, TLC59116_ADDR, pData, len, 100) != HAL_OK)
    {
        if (HAL_I2C_GetError(&hi2c1) != HAL_I2C_ERROR_AF)
        {
            Error_Handler();
        }
    }
}

void TLC59116_LED(uint8_t led, uint8_t state)
{
    if ((led < 0) || (led > 15)) {
        Error_Handler();
    } else {
        TLC59116_WriteReg(led + TLC59116_PWM0, state);
    }
}

void TLC59116_SLEEP(void)
{
    TLC59116_WriteReg(TLC59116_MODE1, TLC59116_MODE1_SLEEP);
}

void TLC59116_WAKE(void)
{
    TLC59116_WriteReg(TLC59116_MODE1, TLC59116_MODE1_DEFAULT);
    HAL_Delay(5);
}

Then in main.c

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_I2C1_Init();
  MX_USB_PCD_Init();
  TLC59116_Init();
  TLC59116_LED(TLC59116_PWM5, 0x01); // Sets LED 5 to ON 

}

Edit: Here is a more complete code example with HAL error checking and such.

Answer 1

Assuming you have STM32CubeMX generate the correct initialization for your I2C bus, then you can assess the TLC59116 using the polling method you referenced:

HAL_I2C_Master_Transmit(I2C_HandleTypeDef *hi2c, uint16_t DevAddress, uint8_t *pData, uint16_t Size, uint32_t Timeout);

Value for setting DevAddress is defined on page 23 of the datasheet, you will have to review your schematic and set bit 0 to 0 when writing a register. Assuming A[3:0] = 0x0 on the board, DevAddress would become:

• 0xC0 for writing (writeAddr) to TLC59116
• 0xC1 for reading (readAddr) from TLC59116

Next, you need to setup the payload which contains the register address and register value to be set. For example (see page 18 of the datasheet):

uint8_t aTxBuffer[2] = {};
aTxBuffer[0] = 0x14; /* LEDOUT0 register */
aTxBuffer[1] = 0x05; /* Turn on LED 0 and LED 1 */

HAL_I2C_Master_Transmit(hi2c1, writeAddr, aTxBuffer, sizeof(aTxBuffer), 100);

However, be sure to review MODE1 register before implementing the above. You need to clear the OSC bit or you will never light an LED.

uint8_t aTxBuffer[2] = {};
aTxBuffer[0] = 0x00; /* MODE1 register */
aTxBuffer[1] = 0x00; /* Example only, review each bit */

HAL_I2C_Master_Transmit(hi2c1, writeAddr, aTxBuffer, sizeof(aTxBuffer), 100);

The above illustrates writing to a single register, to stream data into multiple register locations:

void TLC59116_WriteStream(uint8_t len, uint8_t *pData)
{
    if (len == 0)
    {
        ErrorHandler();
    }
    HAL_I2C_Master_Transmit(&h12c1, TLC59116_ADDR, pData, len, 100);
}

Where TLC59116_ADDR = 0xC0 and pData points to the base address of your message to be sent to TI device.

To set all 16 PWM registers to a 0x00 or off:

uint8_t aTXBuffer[] = { TLC59116_PWM0_AUTOINCR, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
TLC59116_WriteStream(sizeof(aTXBuffer), aTXBuffer);

Where TLC59116_PWM0_AUTOINCR = 0x82;