# HG changeset patch
# User Paul Boddie <paul@boddie.org.uk>
# Date 1714856008 -7200
# Node ID 135649724e29583bcdfe0b6d61c06aea34c01e9e
# Parent  6f492d79dbc0d9e61af3bf7c06256371e20c7f65
Added an I2C set operation.

diff -r 6f492d79dbc0 -r 135649724e29 pkg/landfall-examples/hw_info/hw_info.c
--- a/pkg/landfall-examples/hw_info/hw_info.c	Sat May 04 22:52:55 2024 +0200
+++ b/pkg/landfall-examples/hw_info/hw_info.c	Sat May 04 22:53:28 2024 +0200
@@ -1009,6 +1009,42 @@
   printf("\n");
 }
 
+static void i2c_set(void)
+{
+  void *channel;
+  int num;
+  uint8_t buffer[32];
+  unsigned int address, reg, value;
+
+  channel = get_channel(num_i2c_channels, i2c_channels, &num);
+
+  if (channel == NULL)
+    return;
+
+  if (!read_encoded_number("Address", "%2x", &address))
+    return;
+
+  if (address >= 0x80)
+  {
+    printf("Address must be less than 80.\n");
+    return;
+  }
+
+  if (!read_encoded_number("Register", "%2x", &reg))
+    return;
+
+  if (!read_encoded_number("Value", "%2x", &value))
+    return;
+
+  buffer[0] = (uint8_t) (reg & 0xff);
+  buffer[1] = (uint8_t) (value & 0xff);
+
+  i2c_set_target(channel, address);
+
+  if (!_i2c_write(channel, buffer, 2, 1, i2c_irqs[num], 1000000))
+    printf("Register write failed.\n");
+}
+
 static void i2c_scan(void)
 {
   void *channel;
@@ -1820,10 +1856,12 @@
       new_i2c_channel(i2c);
     else if (!strcmp(token, "g") || !strcmp(token, "get"))
       i2c_get();
-    else if (!strcmp(token, "s") || !strcmp(token, "scan"))
+    else if (!strcmp(token, "S") || !strcmp(token, "scan"))
       i2c_scan();
+    else if (!strcmp(token, "s") || !strcmp(token, "set"))
+      i2c_set();
     else
-      printf("i2c channel | get | list | scan\n");
+      printf("i2c channel | get | list | scan | set\n");
   }
   else
     list_i2c_channels();