root / mainbox / tool.c @ 3811693d
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#include "tool.h" |
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#include "tooltron_mb.h" |
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#include <modbus.h> |
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#include <stdio.h> |
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#include <errno.h> |
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#include <stdlib.h> // TODO temporary |
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|
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modbus_t *ctx; |
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int tool_init_mb(const char *device) { |
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ctx = modbus_new_rtu(device, MB_BAUD, 'N', 8, 1); |
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if (ctx == NULL) { |
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fprintf(stderr, "modbus_new_rtu: %s\n", modbus_strerror(errno));
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return 1; |
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} |
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|
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if (modbus_connect(ctx) == -1) { |
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fprintf(stderr, "modbus_connect: %s\n", modbus_strerror(errno));
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modbus_free(ctx); |
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return 1; |
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} |
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|
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return 0; |
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} |
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|
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void tool_close_mb() {
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modbus_close(ctx); |
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modbus_free(ctx); |
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} |
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|
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static void tool_write_coil(int addr, int bit) { |
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if (modbus_write_bit(ctx, addr, bit) == -1) { |
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fprintf(stderr, "modbus_write_bit: %s\n", modbus_strerror(errno));
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} |
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} |
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static void tool_init(struct tool_t *tool) { |
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// TODO write current limit values
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tool_write_coil(MB_COIL_INIT, 1);
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tool->state = TS_OFF; |
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} |
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static void tool_read_user(struct tool_t *tool) { |
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unsigned short serno[2]; |
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if (modbus_read_registers(ctx, MB_INP_SERNOL, 2, serno) == -1) { |
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fprintf(stderr, "modbus_read_registers: %s\n", modbus_strerror(errno));
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tool->user = 0;
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} else {
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tool->user = MODBUS_GET_INT32_FROM_INT16(serno, 0);
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} |
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} |
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static void tool_grant_access(struct tool_t *tool) { |
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printf("Granting access to %08x on %s\n", tool->user, tool->name);
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tool_write_coil(MB_COIL_EN, 1);
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} |
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static void tool_deny_access(struct tool_t *tool) { |
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printf("Denying access to %08x on %s\n", tool->user, tool->name);
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tool_write_coil(MB_COIL_EN, 0);
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} |
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void tool_request_disable(struct tool_t *tool) { |
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printf("Requesting disable on %s\n", tool->name);
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tool_write_coil(MB_COIL_REQ_DIS, 1);
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} |
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void tool_poll(struct tool_t *tool) { |
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unsigned char status[N_COILS]; |
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if (modbus_set_slave(ctx, SLAVE_ADDR) == -1) { |
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fprintf(stderr, "modbus_set_slave: %s\n", modbus_strerror(errno));
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} |
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if (modbus_read_bits(ctx, 0, N_COILS, status) == -1) { |
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fprintf(stderr, "modbus_read_bits: %s\n", modbus_strerror(errno));
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return;
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} |
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if (!status[MB_COIL_INIT]) {
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tool->state = TS_INIT; |
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} |
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switch (tool->state) {
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case TS_INIT:
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tool_init(tool); |
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break;
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case TS_OFF:
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if (status[MB_COIL_NEW]) {
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tool_read_user(tool); |
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// TODO check actual credentials
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if (rand() & 1) { |
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tool_grant_access(tool); |
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} else {
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tool_deny_access(tool); |
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} |
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} |
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break;
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case TS_ON:
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if (!status[MB_COIL_EN]) {
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printf("Tool %s is off\n", tool->name);
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tool->state = TS_OFF; |
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} |
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break;
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case TS_REQ_DIS:
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if (!status[MB_COIL_EN]) {
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printf("Tool %s is off after requested disable\n", tool->name);
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tool->state = TS_OFF; |
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} |
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break;
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} |
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|
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} |