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usart: SCEN should be configured after CR1 enabled.

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NIIBE Yutaka
2019-03-01 22:22:25 +09:00
parent 304441d393
commit 91dbfaf6b7
1 changed files with 3 additions and 1 deletions
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4
contrib/usart-stm32f103.c
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@@ -181,6 +181,9 @@ usart_config (uint8_t dev_no, uint32_t config_bits)
else else
USARTx->CR3 = 0; USARTx->CR3 = 0;
USARTx->CR1 = cr1_config;
/* SCEN (smartcard enable) should be set _after_ CR1. */
if ((config_bits & MASK_MODE)) if ((config_bits & MASK_MODE))
{ {
if ((config_bits & MASK_MODE) == MODE_SMARTCARD) if ((config_bits & MASK_MODE) == MODE_SMARTCARD)
@@ -194,7 +197,6 @@ usart_config (uint8_t dev_no, uint32_t config_bits)
USARTx->CR3 |= (1 << 2) | (1 << 1); USARTx->CR3 |= (1 << 2) | (1 << 1);
} }
USARTx->CR1 = cr1_config;
return 0; return 0;
} }