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adiv5_swdp.c: Use swdptap_seq_out for initialiation sequence.

This commit is contained in:
Uwe Bonnes 2018-01-23 20:27:43 +01:00
parent e54a826745
commit 7e3fe352ad
2 changed files with 10 additions and 7 deletions
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7
src/platforms/common/swdptap.c
View File

@ -134,6 +134,7 @@ void swdptap_bit_out(bool val)
swdptap_turnaround(0);
gpio_set_val(SWDIO_PORT, SWDIO_PIN, val);
gpio_clear(SWCLK_PORT, SWCLK_PIN);
gpio_set(SWCLK_PORT, SWCLK_PIN);
gpio_set(SWCLK_PORT, SWCLK_PIN);
gpio_clear(SWCLK_PORT, SWCLK_PIN);
@ -149,9 +150,10 @@ swdptap_seq_out(uint32_t MS, int ticks)
swdptap_turnaround(0);
while (ticks--) {
gpio_set_val(SWDIO_PORT, SWDIO_PIN, data);
gpio_set(SWCLK_PORT, SWCLK_PIN);
MS >>= 1;
data = MS & 1;
gpio_set(SWCLK_PORT, SWCLK_PIN);
gpio_set(SWCLK_PORT, SWCLK_PIN);
gpio_clear(SWCLK_PORT, SWCLK_PIN);
}
}
@ -169,13 +171,14 @@ swdptap_seq_out_parity(uint32_t MS, int ticks)
while (ticks--) {
gpio_set_val(SWDIO_PORT, SWDIO_PIN, data);
gpio_set(SWCLK_PORT, SWCLK_PIN);
parity ^= MS;
MS >>= 1;
gpio_set(SWCLK_PORT, SWCLK_PIN);
data = MS & 1;
gpio_clear(SWCLK_PORT, SWCLK_PIN);
}
gpio_set_val(SWDIO_PORT, SWDIO_PIN, parity & 1);
gpio_clear(SWCLK_PORT, SWCLK_PIN);
gpio_set(SWCLK_PORT, SWCLK_PIN);
gpio_set(SWCLK_PORT, SWCLK_PIN);
gpio_clear(SWCLK_PORT, SWCLK_PIN);

10
src/target/adiv5_swdp.c
View File

@ -53,12 +53,12 @@ int adiv5_swdp_scan(void)
return -1;
/* Switch from JTAG to SWD mode */
swdptap_seq_out(0xFFFF, 16);
for(int i = 0; i < 50; i++)
swdptap_bit_out(1);
swdptap_seq_out(0xFFFFFFFF, 16);
swdptap_seq_out(0xFFFFFFFF, 32);
swdptap_seq_out(0xFFFFFFFF, 18);
swdptap_seq_out(0xE79E, 16); /* 0b0111100111100111 */
for(int i = 0; i < 50; i++)
swdptap_bit_out(1);
swdptap_seq_out(0xFFFFFFFF, 32);
swdptap_seq_out(0xFFFFFFFF, 18);
swdptap_seq_out(0, 16);
/* Read the SW-DP IDCODE register to syncronise */