From 99203fb27559f91ff903690338af76f6f29cf52d Mon Sep 17 00:00:00 2001
From: Jan Tuomi <jan@jantuomi.fi>
Date: Thu, 2 Jan 2025 15:36:57 +0200
Subject: WIP flash bootload

---
 atk16_fpga/flash_to_ram.v | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 atk16_fpga/flash_to_ram.v

(limited to 'atk16_fpga/flash_to_ram.v')

diff --git a/atk16_fpga/flash_to_ram.v b/atk16_fpga/flash_to_ram.v
new file mode 100644
index 0000000..2e0f7b6
--- /dev/null
+++ b/atk16_fpga/flash_to_ram.v
@@ -0,0 +1,27 @@
+module flash_to_ram(
+    // SRAM interface
+    output sram_cs_n,
+    output sram_rd_n,
+    output sram_wr_n,
+    output [17:0] sram_addr,
+    output [15:0] sram_in,
+    input  [15:0] sram_out,
+
+    // SPI master interface
+    output wire spi_cs_n,   // Chip select, active low
+    output wire spi_clk,    // SPI clock
+    output wire spi_mosi,   // Master Out Slave In
+    input  wire spi_miso,   // Master In Slave Out
+    output wire spi_rst_n   // Active low reset
+);
+
+    // Copy 128KB from flash address 2^20 onwards to SRAM address 0
+    // 1. Send a read message to the flash
+    // 2. Wait for the flash to respond
+    // 3. Write the data to SRAM
+    // 4. Repeat until 128KB has been copied
+
+
+
+
+endmodule
-- 
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