int uart_set_sample_rate(int ureg, int rate) {
if(ureg > 4)
return -1; // Invalid ureg
uint32_t newSampleRate;
switch(rate) {
case 4:
newSampleRate = UART_SAMPLERATE_4;
break;
case 8:
newSampleRate = UART_SAMPLERATE_8;
break;
case 16:
newSampleRate = UART_SAMPLERATE_16;
break;
default:
return -1; // Invalid sample rate
}
SET_REG(HWUarts[ureg].UBAUD,
(GET_REG(HWUarts[ureg].UBAUD) & (~UART_SAMPLERATE_MASK)) | (newSampleRate << UART_SAMPLERATE_SHIFT));
UARTs[ureg].sample_rate = rate;
uart_set_baud_rate(ureg, UARTs[ureg].baud);
return 0;
}
int serial_init( void )
{
if ( uart_initted || uart_probe() == 0 ) return 0;
/* Disable hardware interrupts */
WRITE( MCR, 0 );
WRITE( IER, 0 );
/* Disable FIFO's for 16550 devices */
WRITE( FCR, 0 );
/* Set for 8-bit, no parity, DLAB bit cleared */
WRITE( LCR, UART_LCR_8BITS );
/* Set baud rate */
uart_set_baud_rate( UART_BAUD_RATE );
/* Assert DTR# and RTS# lines (OUT2?) */
WRITE( MCR, UART_MCR_DTR | UART_MCR_RTS );
/* Clear any garbage in the input buffer */
READ( RBR );
uart_initted = 1;
return 1;
}
int radio_setup_2g()
{
gpio_pin_output(RADIO_GPIO_BB_MUX_SEL, OFF);
gpio_pulldown_configure(RADIO_BB_PULLDOWN, GPIOPDDown);
gpio_pin_output(RADIO_GPIO_BB_ON, OFF);
udelay(100000);
gpio_pin_output(RADIO_GPIO_RADIO_ON, ON);
udelay(100000);
gpio_pin_output(RADIO_GPIO_BB_RESET, ON);
udelay(100000);
gpio_pin_output(RADIO_GPIO_BB_RESET, OFF);
udelay(100000);
gpio_pin_use_as_input(RADIO_GPIO_BB_DETECT);
if(gpio_pin_state(RADIO_GPIO_BB_DETECT) != 0)
{
bufferPrintf("radio: comm board not present, powered on, or at+xdrv=10,2 had been issued.\r\n");
return -1;
}
bufferPrintf("radio: comm board detected.\r\n");
if(!radio_wait_for_ok(10))
{
bufferPrintf("radio: no response from baseband!\r\n");
return -1;
}
bufferPrintf("radio: setting speed to 750000 baud.\r\n");
radio_write("at+ipr=750000\r\n");
// wait a millisecond for the command to totally clear uart
// I wasn't able to detect this condition with uart registers (looking at FIFO count, transmitter empty)
udelay(1000);
uart_set_baud_rate(RADIO_UART, 750000);
if(!radio_wait_for_ok(10))
{
bufferPrintf("radio: no response from baseband!\r\n");
return -1;
}
RadioAvailable = TRUE;
bufferPrintf("radio: ready.\r\n");
speaker_setup();
return 0;
}
int uart_set_clk(int ureg, int clock) {
if(ureg > 4)
return -1; // Invalid ureg
if(clock != UART_CLOCK_PCLK && clock != UART_CLOCK_EXT_UCLK0 && clock != UART_CLOCK_EXT_UCLK1) {
return -1; // Invalid clock
}
SET_REG(HWUarts[ureg].UCON,
(GET_REG(HWUarts[ureg].UCON) & (~UART_CLOCK_SELECTION_MASK)) | (clock << UART_CLOCK_SELECTION_SHIFT));
UARTs[ureg].clock = clock;
uart_set_baud_rate(ureg, UARTs[ureg].baud);
return 0;
}
void
uart_init(uart_t *p_uart)
{
/* UART停止 */
// uart_close(p_uart);
//p_uart->PWREMU_MGMT |= (0x1u << 15) & 0x00008000;
//p_uart->PWREMU_MGMT = (0x1 << 14) | (0x1 << 13) | 0x1;
// /* Set to 16x Over-Sampling Mode */
// p_uart->MDR = 0x00;
//
// /* ボーレートを設定 */
// uint32_t div = CORE_CLK_MHZ * 1000000 / 16 / 2 / BAUD_RATE;
// p_uart->DLL = div & 0xFF;
// p_uart->DLH = (div >> 8) & 0xFF;
uart_open(p_uart);
/* Clear, enable, and reset FIFO */
p_uart->IIR_FCR = 0x0;
p_uart->IIR_FCR = 0x1;
//p_uart->IIR_FCR = 0x7;
p_uart->IIR_FCR = 0x7 | (0x02 << 6); // FIFO trigger level 8 bytes
// p_uart->IIR_FCR = 0xC7;
/* 8 bits data, no parity, one stop bit and clear DLAB bit */
p_uart->LCR = 0x03;
/* Disable autoflow control */
p_uart->MCR = 0x00;
// Disable interrupts
//p_uart->IER = 0x03;
p_uart->IER = 0x0;
uart_set_baud_rate(p_uart, 115200);
}
