You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.1 KiB
85 lines
2.1 KiB
6 years ago
|
//
|
||
|
|
// Created by MightyPork on 2018/01/02.
|
||
|
|
//
|
||
|
|
// SPI master with unicast and multicats support, up to 16 slave select lines
|
||
|
|
//
|
||
|
|
|
||
|
|
#include "comm/messages.h"
|
||
|
|
#include "unit_base.h"
|
||
|
|
#include "utils/avrlibc.h"
|
||
|
|
#include "unit_spi.h"
|
||
|
|
|
||
|
|
#define SPI_INTERNAL
|
||
|
|
#include "_spi_internal.h"
|
||
|
|
|
||
|
|
// SPI master
|
||
|
|
|
||
|
|
enum PinCmd_ {
|
||
|
|
CMD_QUERY = 0,
|
||
|
|
CMD_MULTICAST = 1,
|
||
|
|
};
|
||
|
|
|
||
|
|
/** Handle a request message */
|
||
|
|
static error_t USPI_handleRequest(Unit *unit, TF_ID frame_id, uint8_t command, PayloadParser *pp)
|
||
|
|
{
|
||
|
|
uint8_t slave;
|
||
|
|
uint16_t slaves;
|
||
|
|
uint16_t req_len;
|
||
|
|
uint16_t resp_skip;
|
||
|
|
uint16_t resp_len;
|
||
|
|
const uint8_t *bb;
|
||
|
|
|
||
|
|
uint32_t len;
|
||
|
|
|
||
|
|
switch (command) {
|
||
|
|
/** Write and read byte(s) - slave_num:u8, req_len:u16, resp_skip:u16, resp_len:u16, byte(s) */
|
||
|
|
case CMD_QUERY:
|
||
|
|
slave = pp_u8(pp);
|
||
|
|
resp_skip = pp_u16(pp);
|
||
|
|
resp_len = pp_u16(pp);
|
||
|
|
|
||
|
|
bb = pp_tail(pp, &len);
|
||
|
|
|
||
|
|
TRY(UU_SPI_Write(unit, slave,
|
||
|
|
bb, (uint8_t *) unit_tmp512,
|
||
|
|
len, resp_skip, resp_len));
|
||
|
|
|
||
|
|
// no response if we aren't reading
|
||
|
|
if (resp_len > 0) {
|
||
|
|
com_respond_buf(frame_id, MSG_SUCCESS, (uint8_t *) unit_tmp512, resp_len);
|
||
|
|
}
|
||
|
|
return E_SUCCESS;
|
||
|
|
|
||
|
|
/** Write byte(s) to multiple slaves - slaves:u16, req_len:u16, byte(s) */
|
||
|
|
case CMD_MULTICAST:
|
||
|
|
slaves = pp_u16(pp);
|
||
|
|
|
||
|
|
bb = pp_tail(pp, &len);
|
||
|
|
|
||
|
|
TRY(UU_SPI_Multicast(unit, slaves, bb, len));
|
||
|
|
return E_SUCCESS;
|
||
|
|
|
||
|
|
default:
|
||
|
|
return E_UNKNOWN_COMMAND;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// ------------------------------------------------------------------------
|
||
|
|
|
||
|
|
/** Unit template */
|
||
|
|
const UnitDriver UNIT_SPI = {
|
||
|
|
.name = "SPI",
|
||
|
|
.description = "SPI master",
|
||
|
|
// Settings
|
||
|
|
.preInit = USPI_preInit,
|
||
|
|
.cfgLoadBinary = USPI_loadBinary,
|
||
|
|
.cfgWriteBinary = USPI_writeBinary,
|
||
|
|
.cfgLoadIni = USPI_loadIni,
|
||
|
|
.cfgWriteIni = USPI_writeIni,
|
||
|
|
// Init
|
||
|
|
.init = USPI_init,
|
||
|
|
.deInit = USPI_deInit,
|
||
|
|
// Function
|
||
|
|
.handleRequest = USPI_handleRequest,
|
||
|
|
};
|