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| author | Josh Rahm <joshuarahm@gmail.com> | 2020-11-16 21:02:48 -0700 |
|---|---|---|
| committer | Josh Rahm <joshuarahm@gmail.com> | 2020-11-16 21:02:48 -0700 |
| commit | c0e1b4cdf20c55f2cbbdf3a5889f447974135fd8 (patch) | |
| tree | 003c27f4551f02de304da28cc60314a4516c40ed /02-usart/src/usart.c | |
| parent | cd115ba47253ce8d2680178248116d251abacb23 (diff) | |
| download | stm32l4-c0e1b4cdf20c55f2cbbdf3a5889f447974135fd8.tar.gz stm32l4-c0e1b4cdf20c55f2cbbdf3a5889f447974135fd8.tar.bz2 stm32l4-c0e1b4cdf20c55f2cbbdf3a5889f447974135fd8.zip | |
Got the DMA to send a simple message through UART2.
Diffstat (limited to '02-usart/src/usart.c')
| -rw-r--r-- | 02-usart/src/usart.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/02-usart/src/usart.c b/02-usart/src/usart.c index 42297a8..d4073d0 100644 --- a/02-usart/src/usart.c +++ b/02-usart/src/usart.c @@ -78,3 +78,21 @@ void usart_transmit_str_sync(__IO usart_t* usart, const char* str) usart_transmit_byte_sync(usart, *(str ++)); } } + +void usart_enable_dma(__IO usart_t* usart, usart_enable_t enabled) +{ + switch(enabled) { + case USART_ENABLE_DISABLED: + usart->c3_bf.dmar = 0; + usart->c3_bf.dmat = 0; + break; + + case USART_ENABLE_TX: + usart->c3_bf.dmat = 1; + break; + + case USART_ENABLE_RX: + usart->c3_bf.dmar = 1; + break; + }; +} |