Mercurial > tote-leg
changeset 1:f297755eda97 draft default tip
Add a license
| author | Radomir Dopieralski <sheep-devel@sheep.art.pl> |
|---|---|
| date | Fri, 01 Jun 2018 10:34:36 +0200 |
| parents | 6953c3fb919a |
| children | |
| files | LICENSE firmware/main.c |
| diffstat | 2 files changed, 25 insertions(+), 6 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/LICENSE Fri Jun 01 10:34:36 2018 +0200 @@ -0,0 +1,4 @@ +Copyright 2017 by Radomir Dopieralski. + +This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 +International License (https://creativecommons.org/licenses/by-sa/4.0/).
--- a/firmware/main.c Sat May 19 13:42:11 2018 +0200 +++ b/firmware/main.c Fri Jun 01 10:34:36 2018 +0200 @@ -6,23 +6,38 @@ #define I2C_ADDRESS 0x20 volatile uint8_t command = 0; - +#define REGISTER_COUNT 6 +uint16_t registers[REGISTER_COUNT]; void on_i2c_transmit() { - switch (command) { - default: - USI_TWI_Transmit_Byte(command); + if (command >= REGISTER_COUNT) { + command = 0; } + uint16_t value = registers[command]; + USI_TWI_Transmit_Byte(value & 0xff); + USI_TWI_Transmit_Byte(value >> 8); + ++command; } void on_i2c_receive(int count) { - if (count) { + if (count--) { command = USI_TWI_Receive_Byte(); } + if (command >= REGISTER_COUNT) { + command = 0; + } + if (count < 2) { + return; + } + uint16_t value = USI_TWI_Receive_Byte(); + value |= USI_TWI_Receive_Byte() << 8; + registers[command] = value; } -void main() { +int main() { USI_TWI_Slave_Initialise(I2C_ADDRESS); USI_TWI_On_Slave_Transmit = on_i2c_transmit; USI_TWI_On_Slave_Receive = on_i2c_receive; + while (true) { + } }