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lolserial: support outputting to DEBUG0

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This commit is contained in:
GaryOderNichts 2022-04-20 19:51:51 +02:00
parent 45d496db07
commit a56758f827
1 changed files with 11 additions and 5 deletions
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16
stage2/lolserial.c
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@ -9,6 +9,12 @@
#define LOLSERIAL_WAIT_TICKS 200
#if 1
#define LOLSERIAL_PIN GP_SENSORBAR
#else
#define LOLSERIAL_PIN GP_DEBUG0
#endif
static int enable = 1;
static char suspend_buf[4096];
static int suspend_len = 0;
@ -17,16 +23,16 @@ static int suspend_len = 0;
static void lolserial_lprint(const char *str, int len)
{
/* setup output pin */
clear32(LT_GPIO_OWNER, GP_SENSORBAR);
set32(LT_GPIO_ENABLE, GP_SENSORBAR);
set32(LT_GPIO_DIR, GP_SENSORBAR);
set32(LT_GPIO_OUT, GP_SENSORBAR);
clear32(LT_GPIO_OWNER, LOLSERIAL_PIN);
set32(LT_GPIO_ENABLE, LOLSERIAL_PIN);
set32(LT_GPIO_DIR, LOLSERIAL_PIN);
set32(LT_GPIO_OUT, LOLSERIAL_PIN);
/* loop until null terminator or string end */
for (const char *end = str + len; *str && (str != end); str++) {
for (u32 bits = 0x200 | (*str << 1); bits; bits >>= 1) {
/* set bit value */
mask32(LT_GPIO_OUT, GP_SENSORBAR, (bits & 1) ? GP_SENSORBAR : 0);
mask32(LT_GPIO_OUT, LOLSERIAL_PIN, (bits & 1) ? LOLSERIAL_PIN : 0);
/* wait ticks for bit */
u32 now = read32(LT_TIMER), then = now + LOLSERIAL_WAIT_TICKS;