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Onek8
2025-01-22 17:22:38 +01:00
parent 89b9349629
commit 4c5e729485
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130
Kinc/Sources/kinc/libs/drivers/spi/bitbang/lws-bb-spi.c Normal file
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/*
* SPI bitbang implementation using generic gpio
*
* Copyright (C) 2019 - 2020 Andy Green <andy@warmcat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <libwebsockets.h>
int
lws_bb_spi_init(const lws_spi_ops_t *octx)
{
lws_bb_spi_t *ctx = (lws_bb_spi_t *)octx;
int n;
for (n = 0; n < LWS_SPI_BB_MAX_CH; n++) {
if (ctx->flags & (1 << n))
ctx->gpio->mode(ctx->ncs[n], LWSGGPIO_FL_WRITE);
if (ctx->flags & (1 << (n + 4)))
ctx->gpio->mode(ctx->ncmd[n], LWSGGPIO_FL_WRITE);
}
ctx->gpio->mode(ctx->clk, LWSGGPIO_FL_WRITE |
((octx->bus_mode & LWSSPIMODE_CPOL) ?
0 : LWSGGPIO_FL_START_LOW));
ctx->gpio->mode(ctx->mosi, LWSGGPIO_FL_WRITE | LWSGGPIO_FL_START_LOW);
ctx->gpio->mode(ctx->miso, LWSGGPIO_FL_READ | LWSGGPIO_FL_PULLUP);
return 0;
}
/* if active, prepare DnC before this and call separately for Cmd / Data */
static void
lws_bb_spi_write(lws_bb_spi_t *ctx, const uint8_t *buf, size_t len)
{
uint8_t u, inv = !!(ctx->bb_ops.bus_mode & LWSSPIMODE_CPOL);
while (len--) {
int n;
u = *buf++;
for (n = 0; n < 4; n++) {
ctx->gpio->set(ctx->clk, inv);
ctx->gpio->set(ctx->mosi, !!(u & 0x80));
ctx->gpio->set(ctx->clk, !inv);
ctx->gpio->set(ctx->clk, inv);
ctx->gpio->set(ctx->mosi, !!(u & 0x40));
ctx->gpio->set(ctx->clk, !inv);
u <<= 2;
}
}
ctx->gpio->set(ctx->clk, 0 ^ inv);
}
static void
lws_bb_spi_read(lws_bb_spi_t *ctx, uint8_t *buf, size_t len)
{
uint8_t u = 0;
uint8_t inv = !!(ctx->bb_ops.bus_mode & LWSSPIMODE_CPOL);
while (len--) {
int n;
for (n = 0; n < 8; n++) {
ctx->gpio->set(ctx->clk, inv);
u = (u << 1) | !!ctx->gpio->read(ctx->miso);
ctx->gpio->set(ctx->mosi, !!(u & 0x80));
ctx->gpio->set(ctx->clk, !inv);
}
*buf++ = u;
}
ctx->gpio->set(ctx->clk, 0 ^ inv);
}
int
lws_bb_spi_queue(const lws_spi_ops_t *octx, const lws_spi_desc_t *desc)
{
lws_bb_spi_t *ctx = (lws_bb_spi_t *)octx;
const uint8_t *src = desc->src;
/* clock to idle */
ctx->gpio->set(ctx->clk, 0 ^ !!(octx->bus_mode & LWSSPIMODE_CPOL));
/* enable nCS */
ctx->gpio->set(ctx->ncs[desc->channel], 0);
if (desc->count_cmd) {
ctx->gpio->set(ctx->ncmd[desc->channel], 0);
lws_bb_spi_write(ctx, src, desc->count_cmd);
ctx->gpio->set(ctx->ncmd[desc->channel], 1);
src += desc->count_cmd;
}
if (desc->count_write)
lws_bb_spi_write(ctx, desc->data, desc->count_write);
if (desc->count_read)
lws_bb_spi_read(ctx, desc->dest, desc->count_read);
if (desc->flags & LWS_SPI_FLAG_DATA_CONTINUE)
return 0;
/* disable nCS */
ctx->gpio->set(ctx->ncs[desc->channel], 1);
/* clock to idle */
ctx->gpio->set(ctx->clk, 0 ^ !!(octx->bus_mode & LWSSPIMODE_CPOL));
return 0;
}

93
Kinc/Sources/kinc/libs/drivers/spi/lws-spi.c Normal file
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/*
* Generic SPI
*
* Copyright (C) 2019 - 2022 Andy Green <andy@warmcat.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*/
#include <libwebsockets.h>
int
lws_spi_table_issue(const lws_spi_ops_t *spi_ops, uint32_t flags,
const uint8_t *p, size_t len)
{
lws_spi_desc_t desc;
size_t pos = 0;
memset(&desc, 0, sizeof(desc));
desc.count_cmd = 1;
desc.flags = flags;
while (pos < len) {
desc.count_write = p[pos++];
desc.src = (uint8_t *)&p[pos++];
if (desc.count_write)
desc.data = (uint8_t *)&p[pos];
else
desc.data = NULL;
if (spi_ops->queue(spi_ops, &desc) != ESP_OK) {
lwsl_err("%s: unable to queue\n", __func__);
return 1;
}
pos += desc.count_write;
}
return 0;
}
int
lws_spi_readback(const lws_spi_ops_t *spi_ops, uint32_t flags,
const uint8_t *p, size_t len, uint8_t *rb, size_t rb_len)
{
lws_spi_desc_t desc;
size_t pos = 0;
memset(&desc, 0, sizeof(desc));
desc.count_cmd = 1;
desc.flags = flags;
while (pos < len) {
desc.count_write = p[pos++];
desc.src = (uint8_t *)&p[pos++];
if (desc.count_write)
desc.data = (uint8_t *)&p[pos];
else
desc.data = NULL;
desc.dest = rb;
desc.count_read = rb_len;
if (spi_ops->queue(spi_ops, &desc) != ESP_OK) {
lwsl_err("%s: unable to queue\n", __func__);
return 1;
}
pos += desc.count_write;
}
return 0;
}