i2cget can be used without passing command byte
i2cget 3 0x50 0x5F <-- should shift out register 0x5F
i2cget 3 0x50 <-- should shift out register 0x60
---
toys/other/i2ctools.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
Related to https://github.com/landley/toybox/issues/414
From a914d1c316bc2c1a7c97994e5d4d7bd2d3cc8380 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jarno=20M=C3=A4kip=C3=A4=C3=A4?= <jmaki...@gmail.com>
Date: Fri, 17 Mar 2023 23:03:10 +0200
Subject: [PATCH] i2cget: add support for reading without passing command
i2cget can be used without passing command byte
i2cget 3 0x50 0x5F <-- should shift out register 0x5F
i2cget 3 0x50 <-- should shift out register 0x60
---
toys/other/i2ctools.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/toys/other/i2ctools.c b/toys/other/i2ctools.c
index 8c9adca9..d20eb1ab 100644
--- a/toys/other/i2ctools.c
+++ b/toys/other/i2ctools.c
@@ -271,7 +271,10 @@ void i2cget_main(void)
confirm("Read register 0x%02x from chip 0x%02x on bus %d?", addr, chip, bus);
fd = i2c_open(bus, FLAG(f) ? I2C_SLAVE_FORCE : I2C_SLAVE, chip);
- if (i2c_read_byte(fd, addr, &byte)==-1) perror_exit("i2c_read_byte");
+ if (toys.optc == 3) {
+ if (i2c_read_byte(fd, addr, &byte)==-1) perror_exit("i2c_read_byte");
+ } else if (read(fd, &byte, 1) != 1) perror_exit("i2c_read");
+
printf("0x%02x\n", byte);
close(fd);
}
--
2.34.1
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