diff options
| -rw-r--r-- | hw/bsp/msp_exp430f5529lp/msp_exp430f5529lp.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/hw/bsp/msp_exp430f5529lp/msp_exp430f5529lp.c b/hw/bsp/msp_exp430f5529lp/msp_exp430f5529lp.c index 29f88ccf5..4eed41a4f 100644 --- a/hw/bsp/msp_exp430f5529lp/msp_exp430f5529lp.c +++ b/hw/bsp/msp_exp430f5529lp/msp_exp430f5529lp.c @@ -115,15 +115,29 @@ static void SystemClock_Config(void) USBKEYPID = 0; } +uint32_t wait = 0; + void board_init(void) { __bis_SR_register(GIE); // Enable interrupts. SystemClock_Config(); + // Enable basic I/O. P1DIR |= LED_PIN; // LED output. P1REN |= BUTTON_PIN; // Internal resistor enable. P1OUT |= BUTTON_PIN; // Pullup. + // Enable the backchannel UART (115200) + P4DIR |= BIT5; + P4SEL |= (BIT5 | BIT4); + + UCA1CTL1 |= (UCSSEL__SMCLK | UCSWRST); // Hold in reset, use SMCLK. + UCA1BRW = 4; + UCA1MCTL |= (UCBRF_3 | UCBRS_5 | UCOS16); // Overampling mode, 115200 baud. + // Copied from manual. + UCA1CTL1 &= ~UCSWRST; + + // Set up USB pins. USBKEYPID = USBKEY; USBPHYCTL |= PUSEL; // Convert USB D+/D- pins to USB functionality. USBKEYPID = 0; @@ -150,6 +164,32 @@ uint32_t board_button_read(void) return (P1IN & BIT1); } +int board_uart_read(uint8_t * buf, int len) +{ + for(int i = 0; i < len; i++) + { + // Wait until something to receive (cleared by reading buffer). + while(!(UCA1IFG & UCRXIFG)); + buf[i] = UCA1RXBUF; + } + + return 0; +} + +int board_uart_write(void const * buf, int len) +{ + const char * char_buf = (const char *) buf; + + for(int i = 0; i < len; i++) + { + // Wait until TX buffer is empty (cleared by writing buffer). + while(!(UCA1IFG & UCTXIFG)); + UCA1TXBUF = char_buf[i]; + } + + return 0; +} + #if CFG_TUSB_OS == OPT_OS_NONE volatile uint32_t system_ticks = 0; void __attribute__ ((interrupt(TIMER0_A0_VECTOR))) TIMER0_A0_ISR (void) |