mirror of
https://gitlab.com/zephray/glider.git
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76 lines
No EOL
2.4 KiB
C
76 lines
No EOL
2.4 KiB
C
//
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// Copyright 2022 Wenting Zhang <zephray@outlook.com>
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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#include "pico/stdlib.h"
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#include "hardware/i2c.h"
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#include "max17135.h"
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#define MAX_I2C i2c0
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#define MAX_I2C_ADDR 0x48
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void max_write(uint8_t reg, uint8_t val) {
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uint8_t buf[2];
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int result;
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buf[0] = reg;
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buf[1] = val;
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result = i2c_write_blocking(MAX_I2C, MAX_I2C_ADDR, buf, 2, false);
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if (result != 2) {
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fatal("Failed writing data to MAX");
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}
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}
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uint8_t max_read(uint8_t reg) {
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int result;
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uint8_t buf[1];
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buf[0] = reg;
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result = i2c_write_blocking(MAX_I2C, MAX_I2C_ADDR, buf, 1, true);
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if (result != 1) {
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fatal("Failed writing data to MAX");
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}
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result = i2c_read_blocking(MAX_I2C, MAX_I2C_ADDR, buf, 1, false);
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if (result != 1) {
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fatal("Failed reading data from MAX");
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}
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return buf[0];
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}
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void max_set_vcom(uint16_t vcom) {
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max_write(0x04, (vcom >> 16));
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max_write(0x03, vcom & 0xff);
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}
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void max_enable(bool en) {
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// TODO
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}
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void max_init(void) {
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//max_set_vcom(100); // -1V
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printf("Product Revision: %08x\n", max_read(0x06));
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printf("Product ID: %08x\n", max_read(0x07));
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max_write(0x10, 0x80);
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max_write(0x09, 0x01); // Startup
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for (int i = 0; i < 20; i++) {
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sleep_ms(10);
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uint8_t val = max_read(0x05);
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printf("Status: %08x\n", val);
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}
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printf("Fault: %08x\n", max_read(0x0a));
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} |