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serial-dmm: Implement request timeout mechanism. 

(fixes request flooding for Voltcraft ME-42 and M-3650CR)

This fixes bug #345.
This commit is contained in:
Matthias Heidbrink 2014-05-23 22:26:34 +02:00 committed by Uwe Hermann
parent ab4458df16
commit 2baac44db7
3 changed files with 88 additions and 45 deletions
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66
hardware/serial-dmm/api.c
View File

@ -78,112 +78,112 @@ SR_PRIV struct sr_dev_driver tenma_72_7750_ser_driver_info;
SR_PRIV struct dmm_info dmms[] = {
{
"BBC Goertz Metrawatt", "M2110", "1200/7n2", 1200,
BBCGM_M2110_PACKET_SIZE, NULL,
BBCGM_M2110_PACKET_SIZE, 0, 0, NULL,
sr_m2110_packet_valid, sr_m2110_parse,
NULL,
&bbcgm_m2110_driver_info, receive_data_BBCGM_M2110,
},
{
"Digitek", "DT4000ZC", "2400/8n1/dtr=1", 2400,
FS9721_PACKET_SIZE, NULL,
FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
sr_fs9721_10_temp_c,
&digitek_dt4000zc_driver_info, receive_data_DIGITEK_DT4000ZC,
},
{
"TekPower", "TP4000ZC", "2400/8n1/dtr=1", 2400,
FS9721_PACKET_SIZE, NULL,
FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
sr_fs9721_10_temp_c,
&tekpower_tp4000zc_driver_info, receive_data_TEKPOWER_TP4000ZC,
},
{
"Metex", "ME-31", "600/7n2/rts=0/dtr=1", 600,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&metex_me31_driver_info, receive_data_METEX_ME31,
},
{
"Peaktech", "3410", "600/7n2/rts=0/dtr=1", 600,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&peaktech_3410_driver_info, receive_data_PEAKTECH_3410,
},
{
"MASTECH", "MAS345", "600/7n2/rts=0/dtr=1", 600,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&mastech_mas345_driver_info, receive_data_MASTECH_MAS345,
},
{
"V&A", "VA18B", "2400/8n1", 2400,
FS9721_PACKET_SIZE, NULL,
FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
sr_fs9721_01_temp_c,
&va_va18b_driver_info, receive_data_VA_VA18B,
},
{
"V&A", "VA40B", "2400/8n1", 2400,
FS9721_PACKET_SIZE, NULL,
FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
sr_fs9721_max_c_min,
&va_va40b_driver_info, receive_data_VA_VA40B,
},
{
"Metex", "M-3640D", "1200/7n2/rts=0/dtr=1", 1200,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&metex_m3640d_driver_info, receive_data_METEX_M3640D,
},
{
"Metex", "M-4650CR", "1200/7n2/rts=0/dtr=1", 1200,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&metex_m4650cr_driver_info, receive_data_METEX_M4650CR,
},
{
"PeakTech", "4370", "1200/7n2/rts=0/dtr=1", 1200,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&peaktech_4370_driver_info, receive_data_PEAKTECH_4370,
},
{
"PCE", "PCE-DM32", "2400/8n1", 2400,
FS9721_PACKET_SIZE, NULL,
FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
sr_fs9721_01_10_temp_f_c,
&pce_pce_dm32_driver_info, receive_data_PCE_PCE_DM32,
},
{
"RadioShack", "22-168", "1200/7n2/rts=0/dtr=1", 1200,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&radioshack_22_168_driver_info, receive_data_RADIOSHACK_22_168,
},
{
"RadioShack", "22-805", "600/7n2/rts=0/dtr=1", 600,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&radioshack_22_805_driver_info, receive_data_RADIOSHACK_22_805,
},
{
"RadioShack", "22-812", "4800/8n1/rts=0/dtr=1", 4800,
RS9LCD_PACKET_SIZE, NULL,
RS9LCD_PACKET_SIZE, 0, 0, NULL,
sr_rs9lcd_packet_valid, sr_rs9lcd_parse,
NULL,
&radioshack_22_812_driver_info, receive_data_RADIOSHACK_22_812,
},
{
"Tecpel", "DMM-8061 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9721_PACKET_SIZE, NULL,
2400, FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
sr_fs9721_00_temp_c,
&tecpel_dmm_8061_ser_driver_info,
@ -191,35 +191,35 @@ SR_PRIV struct dmm_info dmms[] = {
},
{
"Voltcraft", "M-3650CR", "1200/7n2/rts=0/dtr=1", 1200,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 150, 20, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&voltcraft_m3650cr_driver_info, receive_data_VOLTCRAFT_M3650CR,
},
{
"Voltcraft", "M-3650D", "1200/7n2/rts=0/dtr=1", 1200,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&voltcraft_m3650d_driver_info, receive_data_VOLTCRAFT_M3650D,
},
{
"Voltcraft", "M-4650CR", "1200/7n2/rts=0/dtr=1", 1200,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 0, 0, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&voltcraft_m4650cr_driver_info, receive_data_VOLTCRAFT_M4650CR,
},
{
"Voltcraft", "ME-42", "600/7n2/rts=0/dtr=1", 600,
METEX14_PACKET_SIZE, sr_metex14_packet_request,
METEX14_PACKET_SIZE, 250, 60, sr_metex14_packet_request,
sr_metex14_packet_valid, sr_metex14_parse,
NULL,
&voltcraft_me42_driver_info, receive_data_VOLTCRAFT_ME42,
},
{
"Voltcraft", "VC-820 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9721_PACKET_SIZE, NULL,
2400, FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
NULL,
&voltcraft_vc820_ser_driver_info,
@ -232,7 +232,7 @@ SR_PRIV struct dmm_info dmms[] = {
* bit "z1" to indicate "diode mode" and "voltage".
*/
"Voltcraft", "VC-830 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9922_PACKET_SIZE, NULL,
2400, FS9922_PACKET_SIZE, 0, 0, NULL,
sr_fs9922_packet_valid, sr_fs9922_parse,
&sr_fs9922_z1_diode,
&voltcraft_vc830_ser_driver_info,
@ -240,7 +240,7 @@ SR_PRIV struct dmm_info dmms[] = {
},
{
"Voltcraft", "VC-840 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9721_PACKET_SIZE, NULL,
2400, FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
sr_fs9721_00_temp_c,
&voltcraft_vc840_ser_driver_info,
@ -248,7 +248,7 @@ SR_PRIV struct dmm_info dmms[] = {
},
{
"UNI-T", "UT60A (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9721_PACKET_SIZE, NULL,
2400, FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
NULL,
&uni_t_ut60a_ser_driver_info,
@ -256,7 +256,7 @@ SR_PRIV struct dmm_info dmms[] = {
},
{
"UNI-T", "UT60E (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9721_PACKET_SIZE, NULL,
2400, FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
sr_fs9721_00_temp_c,
&uni_t_ut60e_ser_driver_info,
@ -265,47 +265,47 @@ SR_PRIV struct dmm_info dmms[] = {
{
/* Note: ES51986 baudrate is actually 19230! */
"UNI-T", "UT60G (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
19200, ES519XX_11B_PACKET_SIZE, NULL,
19200, ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
NULL,
&uni_t_ut60g_ser_driver_info, receive_data_UNI_T_UT60G_SER,
},
{
"UNI-T", "UT61B (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9922_PACKET_SIZE, NULL,
2400, FS9922_PACKET_SIZE, 0, 0, NULL,
sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
&uni_t_ut61b_ser_driver_info, receive_data_UNI_T_UT61B_SER,
},
{
"UNI-T", "UT61C (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9922_PACKET_SIZE, NULL,
2400, FS9922_PACKET_SIZE, 0, 0, NULL,
sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
&uni_t_ut61c_ser_driver_info, receive_data_UNI_T_UT61C_SER,
},
{
"UNI-T", "UT61D (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9922_PACKET_SIZE, NULL,
2400, FS9922_PACKET_SIZE, 0, 0, NULL,
sr_fs9922_packet_valid, sr_fs9922_parse, NULL,
&uni_t_ut61d_ser_driver_info, receive_data_UNI_T_UT61D_SER,
},
{
/* Note: ES51922 baudrate is actually 19230! */
"UNI-T", "UT61E (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
19200, ES519XX_14B_PACKET_SIZE, NULL,
19200, ES519XX_14B_PACKET_SIZE, 0, 0, NULL,
sr_es519xx_19200_14b_packet_valid, sr_es519xx_19200_14b_parse,
NULL,
&uni_t_ut61e_ser_driver_info, receive_data_UNI_T_UT61E_SER,
},
{
"ISO-TECH", "IDM103N", "2400/7o1/rts=0/dtr=1",
2400, ES519XX_11B_PACKET_SIZE, NULL,
2400, ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
sr_es519xx_2400_11b_packet_valid, sr_es519xx_2400_11b_parse,
NULL,
&iso_tech_idm103n_driver_info, receive_data_ISO_TECH_IDM103N,
},
{
"Tenma", "72-7745 (UT-D02 cable)", "2400/8n1/rts=0/dtr=1",
2400, FS9721_PACKET_SIZE, NULL,
2400, FS9721_PACKET_SIZE, 0, 0, NULL,
sr_fs9721_packet_valid, sr_fs9721_parse,
sr_fs9721_00_temp_c,
&tenma_72_7745_ser_driver_info, receive_data_TENMA_72_7745_SER,
@ -313,7 +313,7 @@ SR_PRIV struct dmm_info dmms[] = {
{
/* Note: ES51986 baudrate is actually 19230! */
"Tenma", "72-7750 (UT-D02 cable)", "19200/7o1/rts=0/dtr=1",
19200, ES519XX_11B_PACKET_SIZE, NULL,
19200, ES519XX_11B_PACKET_SIZE, 0, 0, NULL,
sr_es519xx_19200_11b_packet_valid, sr_es519xx_19200_11b_parse,
NULL,
&tenma_72_7750_ser_driver_info, receive_data_TENMA_72_7750_SER,

52
hardware/serial-dmm/protocol.c
View File

@ -68,6 +68,37 @@ static void handle_packet(const uint8_t *buf, struct sr_dev_inst *sdi,
}
}
/** Request packet, if required. */
SR_PRIV int req_packet(struct sr_dev_inst *sdi, int dmm)
{
struct dev_context *devc;
struct sr_serial_dev_inst *serial;
int ret;
if (!dmms[dmm].packet_request)
return SR_OK;
devc = sdi->priv;
serial = sdi->conn;
if (devc->req_next_at && (devc->req_next_at > g_get_monotonic_time())) {
sr_spew("Not requesting new packet yet, %" PRIi64 " ms left.",
((devc->req_next_at - g_get_monotonic_time()) / 1000));
return SR_OK;
}
ret = dmms[dmm].packet_request(serial);
if (ret < 0) {
sr_err("Failed to request packet: %d.", ret);
return ret;
}
if (dmms[dmm].req_timeout_ms)
devc->req_next_at = g_get_monotonic_time() + (dmms[dmm].req_timeout_ms * 1000);
return SR_OK;
}
static void handle_new_data(struct sr_dev_inst *sdi, int dmm, void *info)
{
struct dev_context *devc;
@ -93,6 +124,14 @@ static void handle_new_data(struct sr_dev_inst *sdi, int dmm, void *info)
if (dmms[dmm].packet_valid(devc->buf + offset)) {
handle_packet(devc->buf + offset, sdi, dmm, info);
offset += dmms[dmm].packet_size;
/* Request next packet, if required. */
if (!dmms[dmm].packet_request)
break;
if (dmms[dmm].req_timeout_ms || dmms[dmm].req_delay_ms)
devc->req_next_at = g_get_monotonic_time() +
dmms[dmm].req_delay_ms * 1000;
req_packet(sdi, dmm);
} else {
offset++;
}
@ -108,9 +147,7 @@ static int receive_data(int fd, int revents, int dmm, void *info, void *cb_data)
{
struct sr_dev_inst *sdi;
struct dev_context *devc;
struct sr_serial_dev_inst *serial;
int64_t time;
int ret;
(void)fd;
@ -120,21 +157,14 @@ static int receive_data(int fd, int revents, int dmm, void *info, void *cb_data)
if (!(devc = sdi->priv))
return TRUE;
serial = sdi->conn;
if (revents == G_IO_IN) {
/* Serial data arrived. */
handle_new_data(sdi, dmm, info);
} else {
/* Timeout, send another packet request (if DMM needs it). */
if (dmms[dmm].packet_request) {
ret = dmms[dmm].packet_request(serial);
if (ret < 0) {
sr_err("Failed to request packet: %d.", ret);
/* Timeout; send another packet request if DMM needs it. */
if (dmms[dmm].packet_request && (req_packet(sdi, dmm) < 0))
return FALSE;
}
}
}
if (devc->limit_samples && devc->num_samples >= devc->limit_samples) {
sr_info("Requested number of samples reached.");

13
hardware/serial-dmm/protocol.h
View File

@ -69,6 +69,12 @@ struct dmm_info {
uint32_t baudrate;
/** Packet size in bytes. */
int packet_size;
/** Request timeout [ms] before request is considered lost and a new
* one is sent. Used only if device needs polling. */
int64_t req_timeout_ms;
/** Delay between reception of packet and next request. Some DMMs
* need this. Used only if device needs polling. */
int64_t req_delay_ms;
/** Packet request function. */
int (*packet_request)(struct sr_serial_dev_inst *);
/** Packet validation function. */
@ -102,13 +108,20 @@ struct dev_context {
/** The current number of already received samples. */
uint64_t num_samples;
/** The starting time of current sampling run. */
int64_t starttime;
uint8_t buf[DMM_BUFSIZE];
int bufoffset;
int buflen;
/** The timestamp [µs] to send the next request.
* Used only if device needs polling. */
int64_t req_next_at;
};
SR_PRIV int req_packet(struct sr_dev_inst *sdi, int dmm);
SR_PRIV int receive_data_BBCGM_M2110(int fd, int revents, void *cb_data);
SR_PRIV int receive_data_DIGITEK_DT4000ZC(int fd, int revents, void *cb_data);
SR_PRIV int receive_data_TEKPOWER_TP4000ZC(int fd, int revents, void *cb_data);