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command: Add command_decode_ptr() helper

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Add a helper function to convert from a string buffer passed in the
args[] parameter to an actual pointer.  This avoids all the callers
needing to perfrom pointer manipulation.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor
2020-10-29 23:54:17 -04:00
parent aaf3dc6ac3
commit 473828ca6a
10 changed files with 38 additions and 30 deletions
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4
src/lcd_hd44780.c
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@@ -124,7 +124,7 @@ command_hd44780_send_cmds(uint32_t *args)
{
struct hd44780 *h = oid_lookup(args[0], command_config_hd44780);
gpio_out_write(h->rs, 0);
uint8_t len = args[1], *cmds = (void*)(size_t)args[2];
uint8_t len = args[1], *cmds = command_decode_ptr(args[2]);
hd44780_xmit(h, len, cmds);
}
DECL_COMMAND(command_hd44780_send_cmds, "hd44780_send_cmds oid=%c cmds=%*s");
@@ -134,7 +134,7 @@ command_hd44780_send_data(uint32_t *args)
{
struct hd44780 *h = oid_lookup(args[0], command_config_hd44780);
gpio_out_write(h->rs, 1);
uint8_t len = args[1], *data = (void*)(size_t)args[2];
uint8_t len = args[1], *data = command_decode_ptr(args[2]);
hd44780_xmit(h, len, data);
}
DECL_COMMAND(command_hd44780_send_data, "hd44780_send_data oid=%c data=%*s");