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froze up, maybe thats the fix

master
George Hotz 2018-01-28 11:20:28 -08:00
parent 1465aa478f
commit 7fa4808cf8
1 changed files with 3 additions and 4 deletions
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7
board/drivers/uart.h
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@ -170,7 +170,7 @@ void uart_dma_drain() {
enter_critical_section();
// disable DMA
q->uart->CR3 &= ~USART_CR3_DMAR;
//q->uart->CR3 &= ~USART_CR3_DMAR;
DMA2_Stream5->CR &= ~DMA_SxCR_EN;
while (DMA2_Stream5->CR & DMA_SxCR_EN);
@ -193,7 +193,7 @@ void uart_dma_drain() {
// enable DMA
DMA2_Stream5->CR |= DMA_SxCR_EN;
q->uart->CR3 |= USART_CR3_DMAR;
//q->uart->CR3 |= USART_CR3_DMAR;
exit_critical_section();
}
@ -226,8 +226,7 @@ void uart_init(USART_TypeDef *u, int baud) {
DMA2_Stream5->PAR = (uint32_t)&(USART1->DR);
// channel4, increment memory, periph -> memory, enable
DMA2_Stream5->CR = DMA_SxCR_CHSEL_2 | DMA_SxCR_MINC | DMA_SxCR_EN;
DMA2_Stream5->CR |= DMA_SxCR_HTIE;
DMA2_Stream5->CR = DMA_SxCR_CHSEL_2 | DMA_SxCR_MINC | DMA_SxCR_HTIE | DMA_SxCR_EN;
// this one uses DMA receiver
u->CR3 = USART_CR3_DMAR;