| Line 100... |
Line 100... |
else
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else
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next_state = STATE_IDLE;
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next_state = STATE_IDLE;
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STATE_ADDR_BYTE: if( xmt_byte_done )
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STATE_ADDR_BYTE: if( xmt_byte_done )
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next_state = STATE_ADDR_ACK;
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next_state = STATE_ADDR_ACK;
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else if( start_detected | stop_detected )
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else if( stop_detected )
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next_state = STATE_ERROR;
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next_state = STATE_ERROR;
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else
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else
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next_state = STATE_ADDR_BYTE;
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next_state = STATE_ADDR_BYTE;
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STATE_ADDR_ACK: if(i2c_ack_out)
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STATE_ADDR_ACK: if(i2c_ack_out)
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| Line 175... |
Line 175... |
else if( i2c_clk_fall )
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else if( i2c_clk_fall )
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bit_count <= bit_count + 1;
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bit_count <= bit_count + 1;
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// --------------------------------------------------------------------
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// --------------------------------------------------------------------
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// debug
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wire i2c_start_error = (state == STATE_ADDR_BYTE) & start_detected;
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// --------------------------------------------------------------------
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// outputs
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// outputs
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assign state_out = state;
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assign state_out = state;
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assign tip_addr_byte = (state == STATE_ADDR_BYTE);
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assign tip_addr_byte = (state == STATE_ADDR_BYTE);
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| Line 186... |
Line 191... |
assign tip_read_byte = (state == STATE_READ);
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assign tip_read_byte = (state == STATE_READ);
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assign tip_write_byte = tip_addr_byte | (state == STATE_WRITE);
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assign tip_write_byte = tip_addr_byte | (state == STATE_WRITE);
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assign tip_wr_ack = tip_addr_ack | (state == STATE_WR_ACK);
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assign tip_wr_ack = tip_addr_ack | (state == STATE_WR_ACK);
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assign tip_rd_ack = (state == STATE_RD_ACK);
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assign tip_rd_ack = (state == STATE_RD_ACK);
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assign i2c_error = (state == STATE_ERROR);
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assign i2c_error = (state == STATE_ERROR) | i2c_start_error;
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endmodule
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endmodule
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No newline at end of file
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No newline at end of file
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