varpa: initial public commit

1 files changed, 82 insertions, 0 deletions

diff --git a/firmware/inc/driver/mcp3202.h b/firmware/inc/driver/mcp3202.h
new file mode 100644
index 0000000..b995834
--- /dev/null
+++ b/firmware/inc/driver/mcp3202.h
@@ -0,0 +1,82 @@
+/**
+ * 
+ * Author: Dylan Muller
+ * Copyright (c) 2025 
+ * All rights reserved.
+ * 
+ * - Commercial/IP use prohibited.
+ * - Attribution required.
+ * See License.txt
+ *
+ */
+
+#ifndef MCP3202_H_
+#define MCP3202_H_
+
+#include <stdint.h>
+#include <avr/io.h>
+
+#define MCP3202_BIT_MSBBF(x) (x << 5)
+#define MCP3202_BIT_ODD(x) (x << 6)
+#define MCP3202_BIT_SGL(x) (x << 7)
+#define MCP3202_BIT_START (1 << 0)
+
+#define MCP3202_DAQ_MSB 0x2
+#define MCP3202_DAQ_LSB 0x1
+
+#define MCP3202_BUILD_REQ(MSBF, ODD, SGL) \
+    (uint8_t)(MCP3202_BIT_MSBBF(MSBF) | \
+              MCP3202_BIT_ODD(ODD) | \
+              MCP3202_BIT_SGL(SGL))
+
+#define MCP3202_REQ_START (uint8_t)(MCP3202_BIT_START)
+#define MCP3202_REQ_CH0 MCP3202_BUILD_REQ(1, 0, 1)
+#define MCP3202_REQ_CH1 MCP3202_BUILD_REQ(1, 1, 1)
+#define MCP3202_REQ_PAD (uint8_t)(0x0)
+
+#define MCP3202_ID_FW_POWER 0xA1
+#define MCP3202_ID_REV_POWER 0xA2
+#define MCP3202_ID_DRAIN_VOLT 0xA3
+#define MCP3202_ID_DRAIN_AMP 0xA4
+
+#define MCP3202_CHN_0 0
+#define MCP3202_CHN_1 1
+
+#define MCP3202_CHN_DRAIN_VOLT MCP3202_CHN_0
+#define MCP3202_CHN_DRAIN_AMP MCP3202_CHN_1
+#define MCP3202_CHN_FW_POWER MCP3202_CHN_1
+#define MCP3202_CHN_REV_POWER MCP3202_CHN_0
+
+#define MCP3202_DEV_0 0
+#define MCP3202_DEV_1 1
+
+#define MCP3202_DEV_DRAIN_VOLT MCP3202_DEV_0
+#define MCP3202_DEV_DRAIN_AMP MCP3202_DEV_0
+#define MCP3202_DEV_FW_POWER MCP3202_DEV_1
+#define MCP3202_DEV_REV_POWER MCP3202_DEV_1
+
+#define MCP3202_DEV_0_PORT PORTC
+#define MCP3202_DEV_0_DDR DDRC
+#define MCP3202_DEV_0_SS PORTC0
+#define MCP3202_DEV_1_PORT PORTC
+#define MCP3202_DEV_1_DDR DDRC
+#define MCP3202_DEV_1_SS PORTC1
+
+#define MCP3202_DRAIN_VOLT_GAIN 26
+#define MCP3202_DRAIN_AMP_GAIN 25
+
+
+void adc_init(void);
+
+uint16_t adc_read(
+    uint8_t id,
+    uint8_t conv_bypass
+);
+
+uint16_t adc_read_n(
+    uint8_t id,
+    uint8_t n
+);
+
+
+#endif