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new printf() is too fucking fast, causing DMA buffer overrun in UART transmit. fixed that. Doesn't affect GCC targets.

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got rid of more 16bit ints in new pid controller.

git-svn-id: https://afrodevices.googlecode.com/svn/trunk/baseflight@348 7c89a4a9-59b9-e629-4cfe-3a2d53b20e61
This commit is contained in:
timecop@gmail.com 2013-06-19 03:10:45 +00:00
parent 76617bc7e4
commit ab75f221bb
4 changed files with 27 additions and 16 deletions
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16
src/drv_uart.c
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@ -8,10 +8,11 @@
// Receive buffer, circular DMA
volatile uint8_t rxBuffer[UART_BUFFER_SIZE];
uint32_t rxDMAPos = 0;
volatile uint32_t rxDMAPos = 0;
volatile uint8_t txBuffer[UART_BUFFER_SIZE];
uint32_t txBufferTail = 0;
uint32_t txBufferHead = 0;
volatile uint32_t txBufferTail = 0;
volatile uint32_t txBufferHead = 0;
volatile bool txDMAEmpty = false;
static void uartTxDMA(void)
{
@ -23,7 +24,7 @@ static void uartTxDMA(void)
DMA1_Channel4->CNDTR = UART_BUFFER_SIZE - txBufferTail;
txBufferTail = 0;
}
txDMAEmpty = false;
DMA_Cmd(DMA1_Channel4, ENABLE);
}
@ -34,6 +35,8 @@ void DMA1_Channel4_IRQHandler(void)
if (txBufferHead != txBufferTail)
uartTxDMA();
else
txDMAEmpty = true;
}
void uartInit(uint32_t speed)
@ -109,6 +112,11 @@ uint16_t uartAvailable(void)
return (DMA_GetCurrDataCounter(DMA1_Channel5) != rxDMAPos) ? true : false;
}
bool uartTransmitDMAEmpty(void)
{
return txDMAEmpty;
}
bool uartTransmitEmpty(void)
{
return (txBufferTail == txBufferHead);