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cndm: Do not change select lines while I2C master is running

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Signed-off-by: Alex Forencich <alex@alexforencich.com>
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Alex Forencich
2026-03-18 16:59:27 -07:00
parent 17e61c06f6
commit 1e4e71bcc3
1 changed files with 9 additions and 4 deletions
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13
src/cndm/rtl/cndm_brd_ctrl_i2c.sv
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@@ -213,6 +213,9 @@ taxi_axis_if #(.DATA_W(12), .KEEP_W(1)) axis_i2c_cmd();
taxi_axis_if #(.DATA_W(8)) axis_i2c_tx(); taxi_axis_if #(.DATA_W(8)) axis_i2c_tx();
taxi_axis_if #(.DATA_W(8)) axis_i2c_rx(); taxi_axis_if #(.DATA_W(8)) axis_i2c_rx();
wire i2c_busy;
wire i2c_bus_control;
localparam logic [11:0] localparam logic [11:0]
I2C_CMD_START = 12'h080, I2C_CMD_START = 12'h080,
I2C_CMD_READ = 12'h100, I2C_CMD_READ = 12'h100,
@@ -243,8 +246,8 @@ i2c_master_inst (
/* /*
* Status * Status
*/ */
.busy(), .busy(i2c_busy),
.bus_control(), .bus_control(i2c_bus_control),
.bus_active(), .bus_active(),
.missed_ack(), .missed_ack(),
@@ -419,9 +422,11 @@ always_comb begin
case (state_reg) case (state_reg)
STATE_IDLE: begin STATE_IDLE: begin
dev_sel_next = '0; if (!(i2c_busy || i2c_bus_control)) begin
dev_sel_next = '0;
end
s_axis_cmd_tready_next = !m_axis_rsp_tvalid_reg && !rsp_frame_reg && !(i2c_busy || i2c_bus_control);
s_axis_cmd_tready_next = !m_axis_rsp_tvalid_reg && !rsp_frame_reg;
cmd_ram_wr_data = s_axis_cmd.tdata; cmd_ram_wr_data = s_axis_cmd.tdata;
cmd_ram_wr_strb = '1; cmd_ram_wr_strb = '1;