Fwxv 255 moved I2C to PCA #257
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warren-xu
requested review from
mitchellostler
and removed request for
mitchellostler
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accidentally included gpio_leds folder in the pull request, can ignore |
| return status_msg(STATUS_CODE_INVALID_ARGS, "Invalid PCA9555 port."); | ||
| } | ||
| uint8_t reg_arr[2] = {}; // store read value | ||
| uint8_t reg_to_read = INPUT0; // read the first register |
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What is INPUT0 and INPUT1? Can't seem to find them.
But basically you'll always only read and write 1 byte?
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I was trying to find at what address the PCA9555 registers are at, but I couldn't find them so I assumed it was INPUT0 and INPUT1. Do you know where I should be reading from?
Yeah, essentially the function will read and write one byte for both registers and output them as a 16-bit int.
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If you look at the datasheet pg 19, it should be there
projects/gpio_leds/README.md
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| @@ -0,0 +1,16 @@ | |||
| <!-- | |||
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You should probably get rid of this folder
| return status_msg(STATUS_CODE_INVALID_ARGS, "Invalid PCA9555 port."); | ||
| } | ||
| uint8_t reg_arr[2] = {}; // store read value | ||
| uint8_t reg_to_read = 0x00; // read the first register |
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The regs to read are 0x0 and 0x1? Could you make them into #defines so they're not magic numbers?
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