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set clocktrees, and enable DMA in EM2

pull/1340/head
Srod Karim 2015-07-21 09:43:09 +02:00 committed by Aksel Skauge Mellbye
parent 5a9464b26a
commit 7746a4be75
1 changed files with 12 additions and 2 deletions
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14
libraries/mbed/targets/hal/TARGET_Silicon_Labs/TARGET_EFM32/serial_api.c
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@ -411,9 +411,10 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
if(LEUART_REF_VALID(obj->serial.periph.leuart)) {
// Set up LEUART clock tree to use high-speed clock)
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_CORELEDIV2);
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
CMU_ClockEnable(cmuClock_LFB, true);
CMU_ClockSelectSet(serial_get_clock(obj), cmuSelect_CORELEDIV2);
CMU_ClockSelectSet(serial_get_clock(obj), cmuSelect_LFXO);
obj->serial.periph.leuart.ctrl |= LEUART_CTRL_RXDMAWU | LEUART_CTRL_TXDMAWU
}
CMU_ClockEnable(serial_get_clock(obj), true);
@ -477,6 +478,15 @@ void serial_enable(serial_t *obj, uint8_t enable)
void serial_baud(serial_t *obj, int baudrate)
{
if(LEUART_REF_VALID(obj->serial.periph.leuart)) {
if(baudrate > 9600){
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_CORELEDIV2);
CMU_ClockEnable(cmuClock_LFB, true);
CMU_ClockSelectSet(serial_get_clock(obj), cmuSelect_CORELEDIV2);
}else{
CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO);
CMU_ClockEnable(cmuClock_LFB, true);
CMU_ClockSelectSet(serial_get_clock(obj), cmuSelect_LFXO);
}
LEUART_BaudrateSet(obj->serial.periph.leuart, LEUART_REF_FREQ, (uint32_t)baudrate);
} else {
USART_BaudrateAsyncSet(obj->serial.periph.uart, REFERENCE_FREQUENCY, (uint32_t)baudrate, usartOVS16);