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zketech-ebd-usb: Make a few functions static.

This commit is contained in:
Uwe Hermann 2018-04-03 12:52:38 +02:00
parent ec4806dcf5
commit cb8a0efc5c
2 changed files with 55 additions and 67 deletions
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115
src/hardware/zketech-ebd-usb/protocol.c
View File

@ -20,13 +20,25 @@
#include <config.h>
#include "protocol.h"
/* Log a byte-array as hex values. */
static void log_buf(const char *message, uint8_t buf[], size_t count)
{
char buffer[count * 2 + 1];
for (size_t j = 0; j < count; j++)
sprintf(&buffer[2 * j], "%02X", buf[j]);
buffer[count * 2] = 0;
sr_dbg("%s: %s [%lu bytes]", message, buffer, count);
}
/* Send a command to the device. */
SR_PRIV int zketech_ebd_usb_send(struct sr_serial_dev_inst *serial,
uint8_t buf[], size_t count)
static int send_cmd(struct sr_serial_dev_inst *serial, uint8_t buf[], size_t count)
{
int ret;
zketech_ebd_usb_buffer_debug("Sending", buf, count);
log_buf("Sending", buf, count);
ret = serial_write_blocking(serial, buf, count, 0);
if (ret < 0) {
sr_err("Error sending command: %d.", ret);
@ -37,6 +49,36 @@ SR_PRIV int zketech_ebd_usb_send(struct sr_serial_dev_inst *serial,
return (ret == (int)count) ? SR_OK : SR_ERR;
}
/* Decode high byte and low byte into a float. */
static float decode_value(uint8_t hi, uint8_t lo, float divisor)
{
return ((float)hi * 240.0 + (float)lo) / divisor;
}
/* Encode a float into high byte and low byte. */
static void encode_value(float current, uint8_t *hi, uint8_t *lo, float divisor)
{
int value;
value = (int)(current * divisor);
sr_dbg("Value %d %d %d", value, value / 240, value % 240);
*hi = value / 240;
*lo = value % 240;
}
/* Send updated configuration values to the load. */
static int send_cfg(struct sr_serial_dev_inst *serial, struct dev_context *devc)
{
uint8_t send[] = { 0xfa, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8 };
encode_value(devc->current_limit, &send[2], &send[3], 1000.0);
send[8] = send[1] ^ send[2] ^ send[3] ^ send[4] ^ send[5] ^ \
send[6] ^ send[7];
return send_cmd(serial, send, 10);
}
/* Send the init/connect sequence; drive starts sending voltage and current. */
SR_PRIV int zketech_ebd_usb_init(struct sr_serial_dev_inst *serial,
struct dev_context *devc)
@ -45,7 +87,7 @@ SR_PRIV int zketech_ebd_usb_init(struct sr_serial_dev_inst *serial,
(void)devc;
int ret = zketech_ebd_usb_send(serial, init, 10);
int ret = send_cmd(serial, init, 10);
if (ret == SR_OK)
devc->running = TRUE;
@ -59,12 +101,12 @@ SR_PRIV int zketech_ebd_usb_loadstart(struct sr_serial_dev_inst *serial,
uint8_t start[] = { 0xfa, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xf8 };
int ret;
ret = zketech_ebd_usb_send(serial, start, 10);
ret = send_cmd(serial, start, 10);
sr_dbg("Current limit: %f.", devc->current_limit);
if (zketech_ebd_usb_current_is0(devc))
return SR_OK;
ret = zketech_ebd_usb_sendcfg(serial, devc);
ret = send_cfg(serial, devc);
if (ret == SR_OK) {
sr_dbg("Load activated.");
devc->load_activated = TRUE;
@ -80,7 +122,7 @@ SR_PRIV int zketech_ebd_usb_loadstop(struct sr_serial_dev_inst *serial,
int ret;
uint8_t stop[] = { 0xfa, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xF8 };
ret = zketech_ebd_usb_send(serial, stop, 10);
ret = send_cmd(serial, stop, 10);
if (ret == SR_OK)
devc->load_activated = FALSE;
@ -96,7 +138,7 @@ SR_PRIV int zketech_ebd_usb_stop(struct sr_serial_dev_inst *serial,
(void) devc;
ret = zketech_ebd_usb_send(serial, stop, 10);
ret = send_cmd(serial, stop, 10);
if (ret == SR_OK) {
devc->load_activated = FALSE;
devc->running= FALSE;
@ -105,21 +147,6 @@ SR_PRIV int zketech_ebd_usb_stop(struct sr_serial_dev_inst *serial,
return ret;
}
/* Send updated configuration values to the load. */
SR_PRIV int zketech_ebd_usb_sendcfg(struct sr_serial_dev_inst *serial,
struct dev_context *devc)
{
uint8_t send[] = { 0xfa, 0x07, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf8 };
zketech_ebd_usb_value_encode(devc->current_limit, &send[2],
&send[3], 1000.0);
send[8] = send[1] ^ send[2] ^ send[3] ^ send[4] ^ send[5] ^ \
send[6] ^ send[7];
return zketech_ebd_usb_send(serial, send, 10);
}
/** Read count bytes from the serial connection. */
SR_PRIV int zketech_ebd_usb_read_chars(struct sr_serial_dev_inst *serial,
int count, uint8_t *buf)
@ -140,29 +167,11 @@ SR_PRIV int zketech_ebd_usb_read_chars(struct sr_serial_dev_inst *serial,
turns++;
} while ((received < count) && (turns < 100));
zketech_ebd_usb_buffer_debug("Received", buf, received);
log_buf("Received", buf, received);
return received;
}
/* Decode high byte and low byte into a float. */
SR_PRIV float zketech_ebd_usb_value_decode(uint8_t hi, uint8_t lo, float divisor)
{
return ((float)hi * 240.0 + (float)lo) / divisor;
}
/* Encode a float into high byte and low byte. */
SR_PRIV void zketech_ebd_usb_value_encode(float current, uint8_t *hi,
uint8_t *lo, float divisor)
{
int value;
value = (int)(current * divisor);
sr_dbg("Value %d %d %d", value, value / 240, value % 240);
*hi = value / 240;
*lo = value % 240;
}
SR_PRIV int zketech_ebd_usb_receive_data(int fd, int revents, void *cb_data)
{
struct sr_dev_inst *sdi;
@ -212,9 +221,9 @@ SR_PRIV int zketech_ebd_usb_receive_data(int fd, int revents, void *cb_data)
sr_dbg("V: %02X %02X A: %02X %02X -- Limit %02X %02X", reply[4],
reply[5], reply[2], reply[3], reply[10], reply[11]);
voltage = zketech_ebd_usb_value_decode(reply[4], reply[5], 1000.0);
current = zketech_ebd_usb_value_decode(reply[2], reply[3], 10000.0);
current_limit = zketech_ebd_usb_value_decode(reply[10], reply[11], 1000.0);
voltage = decode_value(reply[4], reply[5], 1000.0);
current = decode_value(reply[2], reply[3], 10000.0);
current_limit = decode_value(reply[10], reply[11], 1000.0);
sr_dbg("Voltage %f", voltage);
sr_dbg("Current %f", current);
@ -306,7 +315,7 @@ SR_PRIV int zketech_ebd_usb_set_current_limit(const struct sr_dev_inst *sdi,
ret = zketech_ebd_usb_loadstop(sdi->conn, devc);
} else {
/* Send new current. */
ret = zketech_ebd_usb_sendcfg(sdi->conn, devc);
ret = send_cfg(sdi->conn, devc);
}
} else {
if (zketech_ebd_usb_current_is0(devc)) {
@ -327,17 +336,3 @@ SR_PRIV gboolean zketech_ebd_usb_current_is0(struct dev_context *devc)
{
return devc->current_limit < 0.001;
}
/* Log a byte-array as hex values. */
SR_PRIV void zketech_ebd_usb_buffer_debug(const char *message, uint8_t buf[],
size_t count)
{
char buffer[count * 2 + 1];
for (size_t j = 0; j < count; j++)
sprintf(&buffer[2 * j], "%02X", buf[j]);
buffer[count * 2] = 0;
sr_dbg("%s: %s [%lu bytes]", message, buffer, count);
}

7
src/hardware/zketech-ebd-usb/protocol.h
View File

@ -42,12 +42,7 @@ struct dev_context {
gboolean load_activated;
};
SR_PRIV float zketech_ebd_usb_value_decode(uint8_t b1, uint8_t b2, float divisor);
SR_PRIV void zketech_ebd_usb_value_encode(float voltage, uint8_t *b1, uint8_t *b2, float divisor);
/* Communication via serial. */
SR_PRIV int zketech_ebd_usb_send(struct sr_serial_dev_inst *serial, uint8_t buf[], size_t count);
SR_PRIV int zketech_ebd_usb_sendcfg(struct sr_serial_dev_inst *serial, struct dev_context *devc);
SR_PRIV int zketech_ebd_usb_read_chars(struct sr_serial_dev_inst *serial,
int count, uint8_t *buf);
@ -65,6 +60,4 @@ SR_PRIV int zketech_ebd_usb_set_current_limit(const struct sr_dev_inst *sdi,
float current);
SR_PRIV gboolean zketech_ebd_usb_current_is0(struct dev_context *devc);
SR_PRIV void zketech_ebd_usb_buffer_debug(const char *message, uint8_t buf[], size_t count);
#endif