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ports/psoc6/machine_i2s.c: WIP for rx prepare.
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Signed-off-by: enriquezgarc <enriquezgarcia.external@infineon.com>
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@jaenrig-ifx
jaenrig-ifx committed Mar 27, 2024
1 parent d464c53 commit eecc088
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Showing 2 changed files with 124 additions and 68 deletions.
37 changes: 19 additions & 18 deletions ports/psoc6/machine_i2s.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -117,16 +117,16 @@ void i2s_audio_clock_init(uint32_t audio_clock_freq_hz) {
static bool clock_set = false;
static uint32_t pll_source_clock_freq_hz = AUDIO_SYS_CLOCK_HZ;

// TODO: Currently this is not working after initialization.
// Once initializing, changing the frequency blocks execution of I2S constructor call.
if (audio_clock_freq_hz != pll_source_clock_freq_hz) {
clock_set = false;
pll_source_clock_freq_hz = audio_clock_freq_hz;
mp_printf(&mp_plat_print, "another clock configuration required\n");
}

if (!clock_set) {

clock_set = true;
mp_printf(&mp_plat_print, "clock will be set\n");

/* Initialize, take ownership of PLL0/PLL */
result = cyhal_clock_reserve(&clock_pll, &CYHAL_CLOCK_PLL[0]);
Expand Down Expand Up @@ -295,7 +295,7 @@ static void i2s_init(machine_i2s_obj_t *self, cyhal_clock_t *clock) {
cyhal_i2s_pins_t pins = { .sck = self->sck, .ws = self->ws, .data = self->sd, .mclk = NC };
cyhal_i2s_config_t config =
{
.is_tx_slave = false,
.is_tx_slave = true,
.is_rx_slave = false,
.mclk_hz = 0,
.channel_length = self->bits,
Expand Down Expand Up @@ -421,6 +421,21 @@ static void mp_machine_i2s_init_helper(machine_i2s_obj_t *self, mp_arg_val_t *ar
mp_raise_ValueError(MP_ERROR_TEXT("invalid format"));
}

uint32_t audio_clock_freq_hz;
uint32_t rate = args[ARG_rate].u_int;
;
if (rate == 8000 ||
rate == 16000 ||
rate == 32000 ||
rate == 48000) {
audio_clock_freq_hz = AUDIO_SYS_CLOCK_HZ;
} else if (rate == 22050 ||
rate == 44100) {
audio_clock_freq_hz = AUDIO_SYS_CLOCK_HZ_1;
} else {
mp_raise_ValueError(MP_ERROR_TEXT("rate not supported"));
}

int32_t ring_buffer_len = args[ARG_ibuf].u_int;
if (ring_buffer_len > 0) {
self->ring_buffer_storage = m_new(uint8_t, ring_buffer_len);
Expand All @@ -436,22 +451,8 @@ static void mp_machine_i2s_init_helper(machine_i2s_obj_t *self, mp_arg_val_t *ar
self->bits = i2s_bits;
self->channel_resolution_bits = i2s_bits_resolution;
self->format = i2s_format;
self->rate = args[ARG_rate].u_int;
uint32_t audio_clock_freq_hz;
if (self->rate == 8000 ||
self->rate == 16000 ||
self->rate == 32000 ||
self->rate == 48000) {
audio_clock_freq_hz = AUDIO_SYS_CLOCK_HZ;
} else if (self->rate == 22050 ||
self->rate == 44100) {
audio_clock_freq_hz = AUDIO_SYS_CLOCK_HZ_1;
} else {
mp_raise_ValueError(MP_ERROR_TEXT("rate not supported"));
}
self->rate = rate;
self->ibuf = ring_buffer_len;


self->callback_for_non_blocking = MP_OBJ_NULL;
self->io_mode = BLOCKING;

Expand Down
155 changes: 105 additions & 50 deletions tests/psoc6/hw_ext/i2s.py
View file
Original file line number Diff line number Diff line change
Expand Up @@ -29,45 +29,85 @@
print("SKIP")
raise SystemExit

sample_num = 3600
max_num = 0x80
sample = bytearray(
[0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF]
)
buf = bytearray([0] * sample_num)
j = 0
for i in range(sample_num):
if i >= (j + 1) * max_num:
j = j + 1
buf[i] = sample[j % len(sample)]


# for i in range(sample_num/max_num - 1):
# print(binascii.hexlify(buf[i*max_num: (i + 1)*max_num]))

audio_out = I2S(
0,
sck=sck_tx_pin,
ws=ws_tx_pin,
sd=sd_tx_pin,
mode=I2S.TX,
bits=32,
format=I2S.STEREO,
rate=22050,
ibuf=20000,
)

# audio_in = I2S(
# 1,
# sck=sck_rx_pin,
# ws=ws_rx_pin,
# sd=sd_rx_pin,
# mode=I2S.RX,
# bits=32,
# format=I2S.STEREO,
# rate=8000,
# ibuf=20000,
# )

def instance0():
audio_in = I2S(
1,
sck=sck_rx_pin,
ws=ws_rx_pin,
sd=sd_rx_pin,
mode=I2S.RX,
bits=32,
format=I2S.STEREO,
rate=16000,
ibuf=20000,
)

# rx_buf = bytearray(1000)
# num_read = audio_in.readinto(rx_buf)
# print("Rx Buffer")
# print(rx_buf)


def instance1():
# I2S transmitter
def make_i2s_tx_data_pattern():
max_num = 0x80
sample = bytearray(
[
0x11,
0x22,
0x33,
0x44,
0x55,
0x66,
0x77,
0x88,
0x99,
0xAA,
0xBB,
0xCC,
0xDD,
0xEE,
0xFF,
]
)
sample_num = max_num * len(sample) * 2
buf = bytearray([0] * sample_num)
j = 0
for i in range(sample_num):
if i >= (j + 1) * max_num:
j = j + 1
buf[i] = sample[j % len(sample)]

for i in range(sample_num / max_num):
print(binascii.hexlify(buf[i * max_num : (i + 1) * max_num]))

return buf

buf = make_i2s_tx_data_pattern()

audio_out = I2S(
0,
sck=sck_tx_pin,
ws=ws_tx_pin,
sd=sd_tx_pin,
mode=I2S.TX,
bits=32,
format=I2S.STEREO,
rate=16000,
ibuf=20000,
)

# while True:
for i in range(20):
num_written = audio_out.write(buf)
print(num_written)


instance0()
instance1()


# tx_done = False
# def tx_complete_irq(obj):
Expand All @@ -76,25 +116,40 @@
# print("tx completed")

# def tx_complete_irq(obj):
# obj.write(buf)
# audio_out.write(buf)

# buf = b"\x01\x00\x17\x15\x16\x44"
# print("tx Buffer")
# print(buf)
# audio_out.irq(tx_complete_irq)
num_written = audio_out.write(buf)


# while not tx_done:
# pass

print("tx blocking done")
# tx_done = False

# print("tx blocking done")

# print(num_written)

print(num_written)
# rx_buf = bytearray(sample_num)
# num_read = audio_in.readinto(rx_buf)
# print("Rx Buffer")
# print(rx_buf)
# audio_out.stop()
# audio_in.stop()
# time.sleep(20)
# for i in range(20):
# time.sleep(1)
# audio_out.deinit()


# from machine import Pin
# import asyncio

# async def blink(period_ms):
# while True:
# print("b" + str(period_ms))
# await asyncio.sleep_ms(period_ms)

# async def main():
# asyncio.create_task(blink(800))
# asyncio.create_task(blink(400))
# await asyncio.sleep_ms(10_000)

# # Running on a generic board
# asyncio.run(main())

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