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Use GPIO2 for led_debug.S

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This commit is contained in:
Angus Gratton 2015-09-14 17:19:09 +10:00
parent e347f296f3
commit 6650369502
3 changed files with 11 additions and 4 deletions
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3
core/exception_vectors.S
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@ -16,6 +16,8 @@
BSD Licensed as described in the file LICENSE BSD Licensed as described in the file LICENSE
*/ */
#include "led_debug.s"
/* Some UserException causes, see table Table 4–64 in ISA reference */ /* Some UserException causes, see table Table 4–64 in ISA reference */
#define CAUSE_SYSCALL 1 #define CAUSE_SYSCALL 1
#define CAUSE_LOADSTORE 3 #define CAUSE_LOADSTORE 3
@ -314,7 +316,6 @@ InnerLoadStoreExceptionHandler:
/* verified an 8- or 16-bit read /* verified an 8- or 16-bit read
a2 holds instruction, a5 holds mask to apply to read value a2 holds instruction, a5 holds mask to apply to read value
*/ */
rsr.excvaddr a3 // read faulting address rsr.excvaddr a3 // read faulting address
ssa8l a3 /* sar is now shift to extract a3's byte */ ssa8l a3 /* sar is now shift to extract a3's byte */
movi a4, ~3 movi a4, ~3

8
core/led_debug.s
View file

@ -4,6 +4,8 @@
* *
* To have this work from initial reset, without needing an iomux call * To have this work from initial reset, without needing an iomux call
* first, choose a pin where iomux defaults to GPIO (ie 0,2,4,5) * first, choose a pin where iomux defaults to GPIO (ie 0,2,4,5)
*
* Current sets on=LOW, as the GPIO2 pin is active low
*/ */
LED_GPIO=2 LED_GPIO=2
GPIO_DIR_SET = 0x6000030c GPIO_DIR_SET = 0x6000030c
@ -19,11 +21,11 @@ GPIO_OUT_CLEAR = 0x60000308
.endm .endm
// Turn LED on. rega, regb will be clobbered // Turn LED on. rega, regb will be clobbered
.macro led_on rega, regb .macro led_off rega, regb
led_op \rega, \regb, GPIO_OUT_SET led_op \rega, \regb, GPIO_OUT_SET
.endm .endm
// Turn LED off. rega, regb will be clobbered // Turn LED on. rega, regb will be clobbered
.macro led_off rega, regb .macro led_on rega, regb
led_op \rega, \regb, GPIO_OUT_CLEAR led_op \rega, \regb, GPIO_OUT_CLEAR
.endm .endm

4
examples/experiments/unaligned_load/unaligned_load.c
View file

@ -121,6 +121,10 @@ void test_string(const char *string, char *label, bool evict_cache)
void user_init(void) void user_init(void)
{ {
sdk_uart_div_modify(0, UART_CLK_FREQ / 115200); sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
gpio_enable(2, GPIO_OUTPUT); /* used for LED debug */
gpio_write(2, 1); /* active low */
printf("\r\n\r\nSDK version:%s\r\n", sdk_system_get_sdk_version()); printf("\r\n\r\nSDK version:%s\r\n", sdk_system_get_sdk_version());
test_string(dramtest, "DRAM", 0); test_string(dramtest, "DRAM", 0);
test_string(iramtest, "IRAM", 0); test_string(iramtest, "IRAM", 0);