diff options
Diffstat (limited to 'nuttx/configs/skp16c26/src/up_leds.c')
| -rw-r--r-- | nuttx/configs/skp16c26/src/up_leds.c | 167 |
1 files changed, 164 insertions, 3 deletions
diff --git a/nuttx/configs/skp16c26/src/up_leds.c b/nuttx/configs/skp16c26/src/up_leds.c index a34b47756..a65d423a9 100644 --- a/nuttx/configs/skp16c26/src/up_leds.c +++ b/nuttx/configs/skp16c26/src/up_leds.c @@ -39,21 +39,91 @@ #include <nuttx/config.h> #include <sys/types.h> + +#include <arch/board/board.h> +#include "up_arch.h" #include "up_internal.h" +#include "chip.h" + +#ifdef CONFIG_ARCH_LEDS + +/************************************************************************************ + * Preprocessor Definitions + ************************************************************************************/ + +/* The SKP62C26 has 3 LEDs control by bits 0 and 2 in port 7 and bit 0 in port 8. */ + +#define GREEN_LED (1 << 2) /* Bit 2, port 7 */ +#define YELLOW_LED (1 << 4) /* Bit 4, port 7 */ +#define RED_LED (1 << 0) /* Bit 0, port 8 */ + +#define GREEN_LED_ON 0 +#define GREEN_LED_OFF GREEN_LED +#define GREEN_LED_MASK GREEN_LED +#define GREEN_LED_PORT M16C_P7 + +#define YELLOW_LED_ON 0 +#define YELLOW_LED_OFF YELLOW_LED +#define YELLOW_LED_MASK YELLOW_LED +#define YELLOW_LED_PORT M16C_P7 + +#define GREENYELLOW_LED_MASK (GREEN_LED_MASK|YELLOW_LED_MASK) +#define GREENYELLOW_LED_PORT M16C_P7 +#define GREENYELLOW_DIR_PORT M16C_PD7 + +#define RED_LED_ON 0 +#define RED_LED_OFF RED_LED +#define RED_LED_MASK RED_LED +#define RED_LED_PORT M16C_P8 +#define RED_DIR_PORT M16C_PD8 /************************************************************************************ - * Definitions + * Private Type Definitions ************************************************************************************/ /************************************************************************************ - * Private Data + * Private Data Definitions ************************************************************************************/ +static const ubyte g_ledstate[7] = +{ + (GREEN_LED_OFF | YELLOW_LED_OFF | RED_LED_OFF), /* LED_STARTED */ + (GREEN_LED_ON | YELLOW_LED_OFF | RED_LED_OFF), /* LED_HEAPALLOCATE */ + (GREEN_LED_OFF | YELLOW_LED_ON | RED_LED_OFF), /* LED_IRQSENABLED */ + (GREEN_LED_ON | YELLOW_LED_ON | RED_LED_OFF), /* LED_STACKCREATED */ + + (GREEN_LED_ON | YELLOW_LED_OFF | RED_LED_ON ), /* LED_INIRQ */ + (GREEN_LED_OFF | YELLOW_LED_ON | RED_LED_ON ), /* LED_SIGNAL */ + (GREEN_LED_ON | YELLOW_LED_ON | RED_LED_ON ) /* LED_ASSERTION */ +}; + +static ubyte g_prevled[3]; +static ubyte g_nestlevel; + /************************************************************************************ * Private Functions ************************************************************************************/ /************************************************************************************ + * Name: up_ledinit + ************************************************************************************/ + +static void up_setleds(ubyte gybits, ubyte rbit) +{ + ubyte regval; + + regval = getreg8(GREENYELLOW_LED_PORT); + regval &= ~GREENYELLOW_LED_MASK; + regval |= gybits; + putreg8(regval, GREENYELLOW_LED_PORT); + + regval = getreg8(RED_LED_PORT); + regval &= ~RED_LED_MASK; + regval |= rbit; + putreg8(regval, RED_LED_PORT); +} + +/************************************************************************************ * Public Functions ************************************************************************************/ @@ -61,9 +131,29 @@ * Name: up_ledinit ************************************************************************************/ -#ifdef CONFIG_ARCH_LEDS void up_ledinit(void) { + register ubyte regval; + + /* Make sure that the LEDs are in the OFF state */ + + regval = getreg8(GREENYELLOW_LED_PORT); + regval |= (GREEN_LED_OFF |YELLOW_LED_OFF); + putreg8(regval, GREENYELLOW_LED_PORT); + + regval = getreg8(RED_LED_PORT); + regval |= RED_LED_OFF; + putreg8(regval, RED_LED_PORT); + + /* Set the direction to output */ + + regval = getreg8(GREENYELLOW_DIR_PORT); + regval |= (GREEN_LED |YELLOW_LED); + putreg8(regval, GREENYELLOW_DIR_PORT); + + regval = getreg8(RED_DIR_PORT); + regval |= RED_LED; + putreg8(regval, RED_DIR_PORT); } /************************************************************************************ @@ -72,6 +162,34 @@ void up_ledinit(void) void up_ledon(int led) { + ubyte ledset; + + /* If this is the ASSERTION led, preserve the Y&G bits from the last setting and + * set the RED LED on. + */ + + if (led == LED_ASSERTION) + { + ledset = g_ledstate[g_prevled[g_nestlevel]]; + up_setleds(ledset & GREENYELLOW_LED_MASK, RED_LED_ON); + } + else if (led < LED_ASSERTION) + { + /* Otherwise, just show the LEDs corresponding to this state */ + + ledset = g_ledstate[led]; + up_setleds(ledset & GREENYELLOW_LED_MASK, ledset & RED_LED_MASK); + + /* If this was a nested states (INIRQ, SIGNAL, or ASSERTION) then + * stack up the previous value. + */ + + if (led > LED_STACKCREATED) + { + g_nestlevel++; + } + g_prevled[g_nestlevel] = led; + } } /************************************************************************************ @@ -80,5 +198,48 @@ void up_ledon(int led) void up_ledoff(int led) { + ubyte ledset; + + /* If this is the ASSERTION led then what we do depends on the previous state */ + + if (led == LED_ASSERTION) + { + /* If the previous state was one of the nested states (INIRQ, SIGNAL, or ASSERTION), + * then turn the green and yellow LEDs all off. That way we can distinguish + * that case from the simple cases. + */ + + if (g_nestlevel > 0) + { + ledset = 0; + } + else + { + ledset = g_ledstate[g_prevled[0]]; + } + up_setleds(ledset & GREENYELLOW_LED_MASK, RED_LED_OFF); + } + else if (led > 0 && led < LED_ASSERTION) + { + /* If this was one of the nested states, then we want to back to the LED setting + * before entering that nested statel. + */ + + if (g_nestlevel > 0) + { + g_nestlevel--; + led = g_prevled[g_nestlevel]; + } + else if (led > LED_STACKCREATED) + { + /* This shouldn't happen */ + + led--; + } + ledset = g_ledstate[led]; + up_setleds(ledset & GREENYELLOW_LED_MASK, ledset & RED_LED_MASK); + g_prevled[g_nestlevel]= led; + } } + #endif /* CONFIG_ARCH_LEDS */ |