処理が増えてくると、DMA転送させてすぐの状態判定だと厳しくなってきます。
I2C with DMA
HAL_Delayを追加します。
main.cpp
void
i2c_write( uint16_t addr, uint8_t *tx_buf, uint16_t len )
{
/// without DMA
// while (HAL_I2C_Master_Transmit(&hi2c1, addr, tx_buf, len, 10000) != HAL_OK)
// {
// if (HAL_I2C_GetError(&hi2c1) != HAL_I2C_ERROR_AF)
// {
// error_type = I2C_ERROR;
// Error_Handler();
// }
// }
/// with DMA
if (HAL_I2C_Master_Transmit_DMA(&hi2c1, addr, tx_buf, len) != HAL_OK)
{
sprintf( uart_message, "\r\n HAL_I2C_Master_Transmit_DMA \r\n" );
p_( uart_message );
error_type = I2C_ERROR;
Error_Handler();
}
HAL_Delay(1);
while (HAL_I2C_GetState(&hi2c1) != HAL_I2C_STATE_READY)
{
sprintf( uart_message, "\r\n WRITE HAL_I2C_STATE_BUSY \r\n" );
p_( uart_message );
HAL_Delay(1);
}
}
void
i2c_read( uint16_t addr, uint8_t reg, uint8_t *rx_buf, uint16_t len )
{
/// without DMA
// while (HAL_I2C_Master_Receive(&hi2c1, addr, rx_buf, len, 10000) != HAL_OK)
// {
// if (HAL_I2C_GetError(&hi2c1) != HAL_I2C_ERROR_AF)
// {
// error_type = I2C_ERROR;
// Error_Handler();
// }
// }
/// with DMA
if (HAL_I2C_Master_Receive_DMA(&hi2c1, addr, rx_buf, len) != HAL_OK)
{
sprintf( uart_message, "\r\n HAL_I2C_Master_Receive_DMA \r\n" );
p_( uart_message );
error_type = I2C_ERROR;
Error_Handler();
}
HAL_Delay(1);
while (HAL_I2C_GetState(&hi2c1) != HAL_I2C_STATE_READY)
{
sprintf( uart_message, "\r\n READ HAL_I2C_STATE_BUSY \r\n" );
p_( uart_message );
HAL_Delay(1);
}
// if (HAL_I2C_Mem_Read_DMA(&hi2c1, addr, (uint16_t)reg, 1, rx_buf, len) != HAL_OK)
// {
// sprintf( uart_message, "\r\n HAL_I2C_Mem_Read_DMA \r\n" );
// p_( uart_message );
// error_type = I2C_ERROR;
// Error_Handler();
// }
}
まとめ
いかにも小手先な感じですが、動作は安定します。
広告
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