diff options
Diffstat (limited to 'ports/beagleboneblack/cpuio.c')
| -rw-r--r-- | ports/beagleboneblack/cpuio.c | 126 |
1 files changed, 113 insertions, 13 deletions
diff --git a/ports/beagleboneblack/cpuio.c b/ports/beagleboneblack/cpuio.c index 75865e7..d1e8177 100644 --- a/ports/beagleboneblack/cpuio.c +++ b/ports/beagleboneblack/cpuio.c @@ -7,6 +7,7 @@ #include "timer.h" #include "am335x.h" #include "uart16550.h" +#include "cli.h" int getUartDivisor(int baud, unsigned char *hi, unsigned char *lo) @@ -137,11 +138,38 @@ ram_vector_install(void) void pinMuxInit(void) { - // Set pin mux configuration for UART0 RX/TX pins - CNTL_MODULE_REG(CONF_UART0_RXD) = SLEWSLOW | RX_ON | - PULL_OFF | MUXMODE_0; - CNTL_MODULE_REG(CONF_UART0_TXD) = SLEWSLOW | RX_OFF | - PULL_OFF | MUXMODE_0; + // Set pin mux configuration for UART0 RX/TX pins + CNTL_MODULE_REG(CONF_UART0_RXD) = SLEWSLOW | RX_ON | + PULL_OFF | MUXMODE_0; + CNTL_MODULE_REG(CONF_UART0_TXD) = SLEWSLOW | RX_OFF | + PULL_OFF | MUXMODE_0; + + // Configure GPIO pins tied to four USR LEDS... + // GPIO1_21: USER0 LED (D2) + CNTL_MODULE_REG(CONF_GPMC_A5) = SLEWSLOW | RX_ON | + PULL_OFF | MUXMODE_7; + // GPIO1_22: USER1 LED (D3) + CNTL_MODULE_REG(CONF_GPMC_A6) = SLEWSLOW | RX_ON | + PULL_OFF | MUXMODE_7; + // GPIO1_23: USER2 LED (D4) + CNTL_MODULE_REG(CONF_GPMC_A7) = SLEWSLOW | RX_ON | + PULL_OFF | MUXMODE_7; + // GPIO1_24: USER3 LED (D5) + CNTL_MODULE_REG(CONF_GPMC_A8) = SLEWSLOW | RX_ON | + PULL_OFF | MUXMODE_7; +} + +void +InitGPIO1(void) +{ + // GPIO_CTRL: Enable GPIO1 module + GPIO1_REG(0x130) = 0; + + // GPIO_OE: 25-24 are outputs... + GPIO1_REG(0x134) &= ~(USR0_LED | USR1_LED | USR2_LED | USR3_LED); + + // All LEDs off... + GPIO1_REG(0x13c) &= ~(USR0_LED | USR1_LED | USR2_LED | USR3_LED); } /* If any CPU IO wasn't initialized in reset.S, do it here... @@ -152,16 +180,88 @@ initCPUio(void) { ram_vector_install(); - // Enable the control module: - CM_WKUP_REG(CM_WKUP_CONTROL_CLKCTRL) |= 2; + // Enable the control module: + CM_WKUP_REG(CM_WKUP_CONTROL_CLKCTRL) |= 2; + + // Enable clock for UART0: + CM_WKUP_REG(CM_WKUP_UART0_CLKCTRL) |= 2; + + // Enable clock for GPIO1: + CM_PER_REG(CM_DIV_M3_DPLL_PER) |= 2; - // Enable clock for UART0: - CM_WKUP_REG(CM_WKUP_UART0_CLKCTRL) |= 2; + pinMuxInit(); - pinMuxInit(); + InitUART(DEFAULT_BAUD_RATE); + InitGPIO1(); + + // Set UART0 mode to 16x + UART0_REG(UART_MDR1) &= ~7; +} + +int +led(int num, int on) +{ + unsigned long bit; + + switch(num) { + case 0: // D0 + bit = USR0_LED; + break; + case 1: // D1 + bit = USR1_LED; + break; + case 2: // D2 + bit = USR2_LED; + break; + case 3: // D3 + bit = USR3_LED; + break; + default: + return(-1); + } + + // GPIO21-24: + if (on) + GPIO1_REG(0x13c) |= bit; + else + GPIO1_REG(0x13c) &= ~bit; + return(0); +} + +void +target_blinkled(void) +{ +#if INCLUDE_BLINKLED + static uint8_t ledstate; + static struct elapsed_tmr tmr; - InitUART(DEFAULT_BAUD_RATE); +#define STATLED_ON() led(0,1) +#define STATLED_OFF() led(0,0) +#ifndef BLINKON_MSEC +#define BLINKON_MSEC 10000 +#define BLINKOFF_MSEC 10000 +#endif - // Set UART0 mode to 16x - UART0_REG(UART_MDR1) &= ~7; + switch(ledstate) { + case 0: + startElapsedTimer(&tmr,BLINKON_MSEC); + STATLED_ON(); + ledstate = 1; + break; + case 1: + if(msecElapsed(&tmr)) { + STATLED_OFF(); + ledstate = 2; + startElapsedTimer(&tmr,BLINKOFF_MSEC); + } + break; + case 2: + if(msecElapsed(&tmr)) { + STATLED_ON(); + ledstate = 1; + startElapsedTimer(&tmr,BLINKON_MSEC); + } + break; + } +#endif } |