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[KINETIS] Fix K20 serial driver 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@7149 35acf78f-673a-0410-8e92-d51de3d6d3f4
master
utzig 2014-08-07 02:42:07 +00:00
parent 576a59bba2
commit 6d80d25b76
1 changed files with 7 additions and 33 deletions
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40
os/hal/ports/KINETIS/K20x/serial_lld.c
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@ -105,9 +105,6 @@ static void serve_interrupt(SerialDriver *sdp) {
u->D = b;
}
}
while (u->S1)
(void)u->D;
}
/**
@ -160,41 +157,18 @@ static void notify3(io_queue_t *qp)
*/
static void configure_uart(UART_TypeDef *uart, const SerialConfig *config)
{
uint16_t sbr, brfa;
uint32_t clock;
uint32_t divisor = (KINETIS_SYSCLK_FREQUENCY * 2 + 1) / config->sc_speed;
/* Disable UART while configuring */
uart->C2 &= ~(UARTx_C2_RE | UARTx_C2_TE);
uart->C1 = 0;
//while (uart->S1 & UARTx_S1_RDRF) {
// (void)uart->D;
//}
clock = KINETIS_SYSCLK_FREQUENCY / 4;
uart->BDH = UARTx_BDH_SBR(divisor >> 13) | (uart->BDH & ~UARTx_BDH_SBR_MASK);
uart->BDL = divisor >> 5;
uart->C4 = UARTx_C4_BRFA(divisor) | (uart->C4 & ~UARTx_C4_BRFA_MASK);
sbr = (uint16_t) clock / (config->sc_speed * 16);
brfa = (uint16_t) (2 * clock * config->sc_speed) - (sbr * 32);
//uart->BDH = UARTx_BDH_SBR(sbr >> 8) | (uart->BDH & ~UARTx_BDH_SBR_MASK);
uart->BDH = 0;
uart->BDL = sbr;
uart->C4 = UARTx_C4_BRFA(brfa) | (uart->C4 & ~UARTx_C4_BRFA_MASK);
uart->TWFIFO = 1;
uart->RWFIFO = 1;
//uart->C2 |= UARTx_C2_RE | UARTx_C2_RIE | UARTx_C2_TE;
uart->C2 |= UARTx_C2_RE | UARTx_C2_TE;
uart->C3 = 0;
while (!(uart->S1 & UARTx_S1_TDRE));
uart->D = '1';
while (!(uart->S1 & UARTx_S1_TDRE));
uart->D = '2';
while (!(uart->S1 & UARTx_S1_TDRE));
uart->D = '3';
//uart->C3 = UARTx_C3_ORIE | UARTx_C3_NEIE | UARTx_C3_FEIE | UARTx_C3_PEIE;
uart->C2 |= UARTx_C2_RE | UARTx_C2_RIE | UARTx_C2_TE;
uart->C3 = UARTx_C3_ORIE | UARTx_C3_NEIE | UARTx_C3_FEIE | UARTx_C3_PEIE;
}
/*===========================================================================*/
@ -286,7 +260,7 @@ void sd_lld_start(SerialDriver *sdp, const SerialConfig *config) {
if (sdp == &SD1) {
SIM->SCGC4 |= SIM_SCGC4_UART0;
configure_uart(sdp->uart, config);
//nvicEnableVector(UART0Status_IRQn, KINETIS_SERIAL_UART0_PRIORITY);
nvicEnableVector(UART0Status_IRQn, KINETIS_SERIAL_UART0_PRIORITY);
}
#endif /* KINETIS_SERIAL_USE_UART0 */