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Diffstat (limited to 'commandline')
-rw-r--r--commandline/i2c-util.c70
-rw-r--r--commandline/i2c-util.h7
-rw-r--r--commandline/i2cdetect.c6
-rw-r--r--commandline/i2cget.c22
-rw-r--r--commandline/i2cset.c14
5 files changed, 98 insertions, 21 deletions
diff --git a/commandline/i2c-util.c b/commandline/i2c-util.c
index 03b2fad..3608e36 100644
--- a/commandline/i2c-util.c
+++ b/commandline/i2c-util.c
@@ -308,6 +308,24 @@ unsigned char i2c_tx_byte(unsigned char byte)
return ack;
}
+unsigned char i2c_hw_tx_byte(unsigned char byte)
+{
+ unsigned char buffer[8];
+
+ int nBytes = usb_control_msg(handle,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN,
+ USBCMD_TX, 0, byte,
+ (char *)buffer, sizeof(buffer), 5000);
+
+ if (nBytes < 1) {
+ fprintf(stderr, "ERR: tx: got %d bytes, expected 1\n",
+ nBytes);
+ exit(1);
+ }
+
+ return buffer[0];
+}
+
unsigned char i2c_rx_byte(unsigned char send_ack)
{
signed char i;
@@ -330,6 +348,24 @@ unsigned char i2c_rx_byte(unsigned char send_ack)
return ret;
}
+unsigned char i2c_hw_rx_byte(unsigned char send_ack)
+{
+ unsigned char buffer[8];
+
+ int nBytes = usb_control_msg(handle,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN,
+ USBCMD_RX, 0, send_ack,
+ (char *)buffer, sizeof(buffer), 5000);
+
+ if (nBytes < 1) {
+ fprintf(stderr, "ERR: tx: got %d bytes, expected 1\n",
+ nBytes);
+ exit(1);
+ }
+
+ return buffer[0];
+}
+
void i2c_start()
{
set_sda(1);
@@ -342,6 +378,17 @@ void i2c_start()
verify_scl_low();
}
+void i2c_hw_start()
+{
+ // discarded
+ unsigned char buffer[8];
+
+ usb_control_msg(handle,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN,
+ USBCMD_START, 0, 0,
+ (char *)buffer, sizeof(buffer), 5000);
+}
+
void i2c_stop()
{
set_scl(1);
@@ -352,6 +399,17 @@ void i2c_stop()
verify_sda_high();
}
+void i2c_hw_stop()
+{
+ // discarded
+ unsigned char buffer[8];
+
+ usb_control_msg(handle,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN,
+ USBCMD_STOP, 0, 0,
+ (char *)buffer, sizeof(buffer), 5000);
+}
+
void i2c_init()
{
usb_init();
@@ -365,6 +423,18 @@ void i2c_init()
USBDEV_VERSION_MAJOR, USBDEV_VERSION_MINOR);
exit(1);
}
+ i2c_hw_setbits();
+}
+
+void i2c_hw_setbits()
+{
+ // discarded
+ unsigned char buffer[8];
+
+ usb_control_msg(handle,
+ USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_ENDPOINT_IN,
+ USBCMD_SETBITS, 0, ((1 << bit_scl) << 8) | (1 << bit_sda),
+ (char *)buffer, sizeof(buffer), 5000);
}
void i2c_deinit()
diff --git a/commandline/i2c-util.h b/commandline/i2c-util.h
index 9be466a..0f47b6e 100644
--- a/commandline/i2c-util.h
+++ b/commandline/i2c-util.h
@@ -10,8 +10,15 @@ unsigned char get_status();
unsigned char i2c_tx_byte(unsigned char byte);
unsigned char i2c_rx_byte(unsigned char send_ack);
+unsigned char i2c_hw_tx_byte(unsigned char byte);
+unsigned char i2c_hw_rx_byte(unsigned char send_ack);
+
void i2c_getopt(int argc, char **argv);
void i2c_start();
void i2c_stop();
void i2c_init();
void i2c_deinit();
+
+void i2c_hw_setbits();
+void i2c_hw_start();
+void i2c_hw_stop();
diff --git a/commandline/i2cdetect.c b/commandline/i2cdetect.c
index 88e5d2e..341900f 100644
--- a/commandline/i2cdetect.c
+++ b/commandline/i2cdetect.c
@@ -24,9 +24,9 @@ int main(int argc, char **argv)
}
- i2c_start();
+ i2c_hw_start();
- if (i2c_tx_byte(i2cid))
+ if (i2c_hw_tx_byte(i2cid))
printf(" %02x", id);
else
fputs(" --", stdout);
@@ -35,7 +35,7 @@ int main(int argc, char **argv)
fputs("\n", stdout);
- i2c_stop();
+ i2c_hw_stop();
i2c_deinit();
return 0;
}
diff --git a/commandline/i2cget.c b/commandline/i2cget.c
index 9ed8bbd..f2bdb15 100644
--- a/commandline/i2cget.c
+++ b/commandline/i2cget.c
@@ -25,11 +25,11 @@ int main(int argc, char **argv)
}
i2c_init();
- i2c_start();
+ i2c_hw_start();
- if (!i2c_tx_byte((address << 1) | 0)) {
+ if (!i2c_hw_tx_byte((address << 1) | 0)) {
fprintf(stderr, "Received NAK from slave 0x%02x, aborting\n", address);
- i2c_stop();
+ i2c_hw_stop();
i2c_deinit();
return 3;
}
@@ -38,29 +38,29 @@ int main(int argc, char **argv)
cmdbuf = strtol(argv[i], &conv_err, 0);
if (conv_err && *conv_err) {
fprintf(stderr, "read command: Conversion error at '%s'\n", conv_err);
- i2c_stop();
+ i2c_hw_stop();
i2c_deinit();
return 2;
}
- if (!i2c_tx_byte(cmdbuf)) {
+ if (!i2c_hw_tx_byte(cmdbuf)) {
fprintf(stderr, "Received NAK after byte %d (0x%02x)\n", i-1, cmdbuf);
- i2c_stop();
+ i2c_hw_stop();
i2c_deinit();
return 4;
}
}
- i2c_start();
- if (!i2c_tx_byte((address << 1) | 1)) {
+ i2c_hw_start();
+ if (!i2c_hw_tx_byte((address << 1) | 1)) {
fprintf(stderr, "Received NAK after reSTART from slave 0x%02x, aborting\n", address);
- i2c_stop();
+ i2c_hw_stop();
i2c_deinit();
return 3;
}
- ret = i2c_rx_byte(0);
+ ret = i2c_hw_rx_byte(0);
- i2c_stop();
+ i2c_hw_stop();
i2c_deinit();
printf("%i\n", ret);
diff --git a/commandline/i2cset.c b/commandline/i2cset.c
index 2d7567f..bdcd3cc 100644
--- a/commandline/i2cset.c
+++ b/commandline/i2cset.c
@@ -24,11 +24,11 @@ int main(int argc, char **argv)
}
i2c_init();
- i2c_start();
+ i2c_hw_start();
- if (!i2c_tx_byte(address << 1)) {
+ if (!i2c_hw_tx_byte(address << 1)) {
fprintf(stderr, "Received NAK from slave 0x%02x, aborting\n", address);
- i2c_stop();
+ i2c_hw_stop();
i2c_deinit();
return 3;
}
@@ -37,19 +37,19 @@ int main(int argc, char **argv)
cmdbuf = strtol(argv[i], &conv_err, 0);
if (conv_err && *conv_err) {
fprintf(stderr, "write command: conversion error at '%s'\n", conv_err);
- i2c_stop();
+ i2c_hw_stop();
i2c_deinit();
return 2;
}
- if (!i2c_tx_byte(cmdbuf)) {
+ if (!i2c_hw_tx_byte(cmdbuf)) {
fprintf(stderr, "Received NAK after byte %d (0x%02x)\n", i-1, cmdbuf);
- i2c_stop();
+ i2c_hw_stop();
i2c_deinit();
return 4;
}
}
- i2c_stop();
+ i2c_hw_stop();
i2c_deinit();
return 0;
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-12 18:33:08 +0000